US3952135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated glass windows for vehicles
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1973-03-05
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Granted: 1976-04-20
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Expires: 1993-03-05
Abstract
Abstract Windows for vehicles particularly windscreens comprise sheets of glass adhesively bonded together by means of a hot melt adhesive which is an ethylene copolymer containing from 7 to 18% by weight of methacrylic acid and sufficient methyl methacrylate such that together the methyl methacrylate and methacrylic acid constitute from 20 to 35% by weight of the copolymer and the copolymer has a melt flow index of at least 0.1 and not more than 2. Also disclosed are ethylene copolymers as defined above.
Inventors
- 👤 John Edward Priddle
- 👤 Andrzej Pajaczkowski
- 👤 Peter Incledon Vincent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:55
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10559; B32B17/10577; B32B17/10009; B32B17/10036; B32B17/10743; B32B17/10807; B32B17/10816; Y; Y10; Y10S; Y10S526/00; Y10S526/935; Y10S526/937; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31645; Y10T428/31649
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
91 words
A laminated glass window comprising opposed sheets of glass whose opposed surfaces are adhesively bonded together by means of a copolymer of ethylene which has a melt flow index in grams per 10 minutes of at least 0.1 and not more than 2 and which consists essentially of from 2.65 to 7.75 mole % of copolymerised acrylic or methacrylic acid and in addition sufficient copolymerised methyl methaceylate such that the ester and the acid together constitute at least 6.9 mole % and not more than 14 mole % of the copolymer.
Claim 2
Dependent Claim
91 words
A laminated glass window comprising opposed sheets of glass whose opposed surfaces are adhesively bonded together by means of a copolymer of ethylene which has a melt flow index in grams per 10 minutes of at least 0.1 and not more than 2 and which consists essentially of from 2.65 to 7.75 mole % of copolymerised acrylic or methacrylic acid and in addition sufficient copolymerised methyl methaceylate such that the ester and the acid together constitute at least 6.9 mole % and not more than 14 mole % of the copolymer.
Claim 3
Dependent Claim
14 words
A laminated glass window according to claim 1 wherein the window is a windscreen.
Claim 4
Dependent Claim
35 words
A window according to claim 1 wherein the sheets of glass are bonded together by means of a copolymer comprising at least 3.85 mole % to 6.10 mole % of copolymerised acrylic or methacrylic acid.
Claim 5
Dependent Claim
43 words
A window according to claim 1 wherein the sheets of glass are bonded together by means of a copolymer in which the ester and the acid together constitute at least 7.80 mole % and not more than 14 mole % of the copolymer.
Claim 6
Dependent Claim
33 words
A window according to claim 1 wherein the sheets of glass are bonded together by means of a copolymer having a melt flow index of at least 0.8 and not more than 1.4.
Claim 7
Dependent Claim
27 words
A window according to claim 1 wherein the sheets of glass are bonded together by means of a copolymer in which the copolymerised acid is methacrylic acid.
References Cited (Backward Citations)
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US3201374A
Cited
US3344014A
Cited
US3532590A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-20 | 1979-10-20 | 1980-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-20 | 1983-10-20 | 1984-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-20 | 1987-10-20 | 1988-04-20 | $7700.00 | Window Closed / Lapsed |