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Patent US3704256A successfully refreshed from Google Patents.
US3704256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-resistant polyurethanes
Assignee: JBS USA LLC
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Filing: 1969-12-04
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Granted: 1972-11-28
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Expires: 1989-12-04
Abstract
Abstract HALOGEN-CONTAINING POLYISOCYANATES, OBTAINED BY REACTING A HALOGEN-CONTAINING HIGHER FATTY ACID ESTER AND A POLYISOCYANATE, ARE PRODUCED AND USED TO PREPARE FLAME-RESISTANT, NON-RIGID, CELLULAR MATERIALS SUCH AS POLYURETHANE FOAMS HAVING MINIMUM SHRINKAGE ON CURING.
Inventors
- 👤 Robert L Shone
- 👤 Thomas W Findley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:08
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3802; C08G18/3817; C08G18/70; C08G18/72; C08G18/80; C08G18/8003; C08G18/8051
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |