Patent US3692707A successfully refreshed from Google Patents.
US3692707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prepolymers and fire retardant polyurethanes therefrom
Assignee: Dow Chemical Co
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Filing: 1970-08-19
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Granted: 1972-09-19
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Expires: 1990-08-19
Abstract
Abstract NOVEL HALOGEN OR PHOSPHORUS-CONTAINING PREPOLYMERS ARE EMPLOYED TO PREPARE POLYURETHANE COMPOSITIONS HAVING IMPROVED FIRE RETARDANT PROPERTIES.
Inventors
- 👤 Ronnie M Pruit
- 👤 Howard D Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:52
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3878; C08G18/3882; C08G18/3885; C08G18/3802; C08G18/3804; C08G18/3806; C08G18/40; C08G18/48; C08G18/50; C08G18/5003; C08G18/5006; C08G18/5075; C08G18/5081; C08G18/5084
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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |