Ely Holdings Limited v. O'Keeffe's, Inc.
- Joseph Spero
- 3:18-cv-06721
- U.S. District Court · Northern District of California
- 21
In Ely Holdings v. O'Keeffe’s, Judge Spero construed disputed patent terms for a glass-flooring infringement case, leaving one issue pending supplemental evidence.
Ely Holdings Limited, Greenlite Glass Systems Inc., and O’Keeffe’s, Inc. are affected because the order defines how disputed terms in the asserted patent claims will be interpreted in the infringement case. The ruling on part of the meaning of “fire-rated glass” remained pending supplemental evidence.
What happened
Ely Holdings Limited and Greenlite Glass Systems Inc. sued O’Keeffe’s, Inc., doing business as SaftiFirst, alleging infringement of a patent concerning structural and fire-rated glass in architectural flooring. The parties asked Judge Joseph Spero to interpret nine disputed claim terms.
The court ruled that the glass layers must not touch; load-transferring structures must carry all load from the structural glass directly to the frame without transmitting that load to the fire-rated glass; and, for one claim, the fire-rated glass may hang from the structural glass with a gap of more than 0 and less than 50 millimeters containing some air. The court also construed “glazing bar” as a metal bar and declined to add a more specific construction for the distance term.
Judge Spero withheld a ruling on part of the meaning of “fire-rated glass” pending supplemental materials about products cited in the patent, due January 2, 2020. The court entered the claim constructions described in the order.
The detailed version
- Ely Holdings Limited v. O'Keeffe's, Inc. · No. 3:18-cv-06721
- Joseph Spero
- Dec. 19, 2019
Background
Ely Holdings Limited and Greenlite Glass Systems Inc. alleged that O’Keeffe’s, Inc., doing business as SaftiFirst, infringed U.S. Patent No. 7,694,475. The patent concerns architectural glass flooring with a structural-glass layer above a fire-rated-glass layer. The claimed load-transferring means transmit loads from the structural glass directly to the supporting structural frame while bypassing the fire-rated glass.
The parties disputed nine claim terms. Claim construction is the court’s interpretation of the words and phrases that define the scope of patent claims. The court held a tutorial and hearing on December 19, 2019.
Rulings on the disputed terms
- Claim 1—separation of the glass layers: The court construed the phrase to mean that the structural glass and fire-rated glass are separated by one or more load-transferring means, so the structural glass does not touch the fire-rated glass. The space may be empty or filled with non-glass material, but it may not be filled with structural glass or fire-rated glass. - Claim 1—vertical load transfer and bypassing: The court construed the phrase to require the load-transferring means, alone or together, to transfer all load from the structural glass directly to the structural frame, so no load from the structural glass is transmitted to the fire-rated glass. - Claim 21—suspended fire-rated glass: The fire-rated glass must hang from the structural glass, with a distance greater than 0 and less than 50 millimeters between the layers, and air must fill some portion of the space. - Claim 24—load transfer and bypassing: The court applied the same all-load requirement: the load-transferring means collectively transfer all load applied to the structural glass directly to the structural frame, with no load from the structural glass transmitted to the fire-rated glass. - Claim 24—meaning of structural glass and fire-rated glass: The court withheld a ruling on whether fire-rated glass may contain additional layers beyond the configurations discussed by the parties. It ordered supplemental evidentiary materials about the nature of certain products cited in the patent by January 2, 2020. The court did accept that fire-rated glass must have glass layers on the outside of the intumescent material and construed structural glass as a laminated glass sheet made of at least two glass layers capable of bearing weight. The court also adopted the view that fire-rated glass denotes glass rated for designated fire resistance by a testing authority. - Claim 2—distance between layers: The court declined to construe the phrase beyond its plain meaning. The separate requirement that the layers be “separated” already means they cannot touch, so the distance is greater than zero. - Claim 24—support for the two layers: The load-transferring means must bear the structural glass’s weight, and the structural frame must bear the fire-rated glass’s weight, so the structural glass does not bear the fire-rated glass’s weight. The court stated that this claim does not require empty space rather than another non-load-bearing material between the layers. - Claim 25—portions of the load-transferring means: The first portion bears the load applied to the structural glass, and the second portion transmits that load to the structural frame, such that the load-transferring means collectively bear all load applied to the structural glass. - “Glazing bar”: The court adopted the plaintiffs’ proposed construction of “metal bar.” It rejected the defendant’s narrower construction requiring the bar to take the applied load on the structural glass because that meaning would be inconsistent with other claims in which a glazing bar can function as a spacer supporting suspended fire-rated glass.
Disposition and significance
The court entered the stated claim constructions and left the identified fire-rated-glass issue unresolved pending supplemental submissions. This order interpreted the patent claims; the opinion text does not state a final determination on whether O’Keeffe’s, Inc. infringed the patent.
Read the full 21-page opinion on CourtListener, the free public archive maintained by the Free Law Project.