US3900655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated safety glass and/or plastic
Assignee: Atlantic Richfield Co
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Filing: 1974-01-25
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Granted: 1975-08-19
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Expires: 1994-01-25
Abstract
Abstract Laminated glass and/or plastic articles useful as safety glass windows and windshields of automotive vehicles and for other purposes are made with a thermoplastic polyurethane interlayer wherein the interlayer is the reaction product of a cyclic nitrile carbonate and at least one hydroxyl-containing compound selected from (1) a glycol such as a polyalkylene ether glycol or a polyester glycol having a number average molecular weight of from about 550 to about 4,000, and (2) a diol having primary or secondary hydroxyl groups and a molecular weight less than about 250.
Inventors
- 👤 Larry G Wolgemuth
- 👤 Benjamin C Wilbur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:53
CPC Classifications
C; C08; C08G; C08G71/00; C08G71/04; B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10018; B32B17/10165; B32B17/10174; B32B17/1055; B32B17/10688; B32B17/1077; B32B2333/00; B32B2333/04; B32B2333/12; B32B2369/00; B32B2605/00; B32B2605/006; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24959; Y10T428/24967; Y10T428/31504; Y10T428/31507; Y10T428/31551; Y10T428/31565; Y10T428/31598; Y10T428/31601
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
51 words
A LAMINATED SAFETY GLASS ARTICLE COMPRISING AN INTERLAYER OF A PREFORMED POLYURETHANE ELASTOMER SANDWICHED BETWEEN A LAYER OF GLASS AND A SECOND LAYER SELECTED FROM THE GROUP CONSISTING OF GLASS AND RIGID TRANSPARENT PLASTIC WHEREIN SAID POLYURETHANE IS THE REACTION PRODUCT OF A. A CYCLIC NITRILE CARBONATE COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
51 words
A LAMINATED SAFETY GLASS ARTICLE COMPRISING AN INTERLAYER OF A PREFORMED POLYURETHANE ELASTOMER SANDWICHED BETWEEN A LAYER OF GLASS AND A SECOND LAYER SELECTED FROM THE GROUP CONSISTING OF GLASS AND RIGID TRANSPARENT PLASTIC WHEREIN SAID POLYURETHANE IS THE REACTION PRODUCT OF A. A CYCLIC NITRILE CARBONATE COMPOUND HAVING THE FORMULA
Claim 3
Dependent Claim
15 words
A laminated article according to claim 1 wherein said glycol is a polyalkylene ether glycol.
Claim 4
Dependent Claim
14 words
A laminated article according to claim 1 wherein said glycol is a hydroxyl-terminated polyester.
Claim 5
Dependent Claim
17 words
A laminated article according to claim 2 wherein said polyalkylene ether glycol is a polytetramethylene ether glycol.
Claim 6
Dependent Claim
24 words
A laminated article according to claim 4 wherein said polytetramethylene ether glycol has a number average molecular weight from about 800 to about 2,000.
Claim 7
Dependent Claim
12 words
A laminated article according to claim 1 wherein said diol is 1,4-butanediol.
Claim 8
Dependent Claim
21 words
A laminated article according to claim 1 wherein R is a divalent hydrocarbon radical having about 2 to 12 carbon atoms.
Claim 9
Dependent Claim
39 words
A laminated article according to claim 1 wherein R is a hydrocarbon radical having 2 to 12 carbon atoms, said glycol is selected from the group consisting of polytetramethylene ether glycols and hydroxyl-terminated polyesters, and said diol is 1,4-butanediol.
Claim 10
Dependent Claim
22 words
A laminated article according to claim 8 wherein the mole ratio of said diol to said glycol is from 0.2 to 3:1.
Claim 11
Dependent Claim
17 words
A laminated article according to claim 1 wherein said interlayer has a thickness of about 0.015-0.05 inch.
Claim 12
Dependent Claim
18 words
A laminated article according to claim 1 wherein each layer of glass is about 0.05-0.5 inch in thickness.
Claim 13
Dependent Claim
21 words
A laminated article according to claim 1 wherein one outer layer is glass and another outer layer is a rigid plastic.
Claim 14
Dependent Claim
13 words
A laminated article according to claim 12 wherein said rigid plastic is poly(methylmethacrylate).
Claim 15
Dependent Claim
13 words
A laminated article according to claim 12 wherein said rigid plastic is polycarbonate.
Claim 16
Dependent Claim
52 words
A laminated safety glass article comprising an interlayer of a preformed polyurethane elastomer sandwiched between an outer layer of glass and another outer layer selected from the group consisting of glass and rigid, transparent plastic wherein said polyurethane is the reaction product of a. a cyclic nitrile carbonate compound having the formula
Claim 17
Dependent Claim
52 words
A laminated safety glass article comprising an interlayer of a preformed polyurethane elastomer sandwiched between an outer layer of glass and another outer layer selected from the group consisting of glass and rigid, transparent plastic wherein said polyurethane is the reaction product of a. a cyclic nitrile carbonate compound having the formula
Claim 18
Dependent Claim
36 words
A laminated article according to claim 15 wherein R is a divalent hydrocarbon radical having 2 to 12 carbon atoms and said glycol is selected from the group consisting of polytetramethylene ether glycols and hydroxyl-terminated polyEsters.
Claim 19
Dependent Claim
15 words
A laminated article according to claim 16 wherein said low molecular weight diol is 1,4-butanediol.
Claim 20
Dependent Claim
13 words
A laminated article according to claim 21 wherein said rigid plastic is polycarbonate.
Claim 21
Dependent Claim
13 words
A laminated article according to claim 15 wherein said rigid plastic is poly(methylmethacrylate).
Claim 22
Dependent Claim
18 words
A laminated article according to claim 15 wherein one layer is glass and another layer is rigid plastic.
Claim 23
Dependent Claim
13 words
A laminated article according to claim 20 wherein said rigid plastic is poly(methylmethacrylate).
Claim 24
Dependent Claim
13 words
A laminated article according to claim 20 wherein said rigid plastic is polycarbonate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |