US3711364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety glass
Assignee: EIDP Inc
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Filing: 1970-03-20
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Granted: 1973-01-16
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Expires: 1990-03-20
Abstract
Abstract A SAFETY GLASS WHEREIN TWO LAYERS OF GLASS HAVE AN INTERLAYER DISPOSED BETWEEN THEM OF POLYURETHANE ELASTOMER OF (A) POLYTETRAMETHYLENE ETHER GLYCOL HAVING A NUMBER AVERAGE MOLECULAR WEIGHT OF BOUT 800 TO 2000, (B) 1,4-BUTANEDIOL, AND (C) 2,4-TOYLENE DIISOCYANATE OR MIXTURES THEREOF CONTAINING UP TO ABOUT 35 WEIGHT PERCENT 2,6-TOLYLENE DIISOCYANATE, THE QUANTITIES OF REACTANTS BEING ABOUT 2 TO 3.5 MOLES OF BUTANEDIOL PER MOLE OF SAID GLYCOL, AND APPROXIMATELY EQUIVALENT AMOUNTS OF SAID DIISOCYANATE.
Inventors
- 👤 L Ahramjian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:49
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6674; B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/1077; C03; C03C; C03C27/00; C03C27/06; C09; C09J; C09J175/00; C09J175/04; C09J175/08; B32B2375/00; Y; Y10; Y10S; Y10S528/00; Y10S528/906; Y10T; Y10T428/00; Y10T428/26; Y10T428/31504; Y10T428/31551; Y10T428/31598; Y10T428/31601; Y10T428/31645
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |