Patent US4952258A successfully refreshed from Google Patents.
US4952258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing laminated safety glass
Assignee: Hoechst AG
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Filing: 1989-05-04
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Granted: 1990-08-28
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Expires: 2009-05-04
Abstract
Abstract A process for producing laminated safety glass is disclosed, comprising depositing a film which comprises at least one function layer on a plastic sheet, inserting the sheet between a plurality of further layers, such as two polyvinylbutyral sheets which are in turn enclosed by glass panes, such that the plastic sheet projects beyond the edges of the other layers, clamping the plastic sheet along its projecting sections, and laminating the layers. A clamping device for performing the process and a laminated safety glass produced by the process are also disclosed.
Inventors
- 👤 Gerhard Grolig
- 👤 Peter Boening
- 👤 Manfred Kuechler
- 👤 Guenter Reinhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:44
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/36; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; B32B17/10165; B32B17/10174; B32B17/10293; B32B17/1055; B32B17/10761; B32B17/10807; B32B17/10899; B32B17/10935
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
99 words
A process for producing laminated safety glass comprising a plurality of layers, at least one of which is a function layer, which comprises the steps of providing a plastic sheet layer, depositing a film on said plastic sheet layer, inserting said plastic sheet layer between a plurality of further layers such that said plastic sheet layer projects beyond the edges of said further layers, clamping said plastic sheet layer along its projecting sections without clamping the edges of said plurality of further layers, and laminating the stack of said plurality of layers while said plastic sheet layer remains clamped.
Claim 2
Dependent Claim
99 words
A process for producing laminated safety glass comprising a plurality of layers, at least one of which is a function layer, which comprises the steps of providing a plastic sheet layer, depositing a film on said plastic sheet layer, inserting said plastic sheet layer between a plurality of further layers such that said plastic sheet layer projects beyond the edges of said further layers, clamping said plastic sheet layer along its projecting sections without clamping the edges of said plurality of further layers, and laminating the stack of said plurality of layers while said plastic sheet layer remains clamped.
Claim 3
Dependent Claim
18 words
The process as claimed in claim 1, further comprising the step of applying compaction pressure to said stack.
Claim 4
Dependent Claim
46 words
The process as claimed in claim 2, wherein said plastic sheet layer is clamped in a flat plane on all four sides thereof during application of said compaction pressure, and wherein said compaction pressure is applied by passing said stack through means for applying compaction pressure.
Claim 5
Dependent Claim
33 words
The process as claimed in claim 2, wherein said plastic sheet layer is disposed in a spherically curved area and is clamped on all four sides thereof during application of said compaction pressure.
Claim 6
Dependent Claim
32 words
The process as claimed in claim 2, further comprising the step of applying heat and pressure to said stack, wherein the clamping of said plastic sheet layer is maintained during said step.
Claim 7
Dependent Claim
46 words
The process as claimed in claim 1, wherein said film is deposited on said plastic sheet layer by sputtering, vacuum vapor deposition, printing, or wet coating and wherein said film is composed of one or more layers at least one of which is a function layer.
References Cited (Backward Citations)
EP0077672A1
Cited
US4445953A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-27 | 1994-02-26 | 1994-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-27 | 1998-02-26 | 1998-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-27 | 2002-02-26 | 2002-08-28 | $7700.00 | Window Closed / Lapsed |