Patent US3470118A successfully refreshed from Google Patents.
US3470118A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-resistant polyol urethane foam composition and process of producing the same
Assignee: Stepan Co
•
Filing: 1966-05-20
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Granted: 1969-09-30
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Expires: 1986-05-20
Abstract
No abstract record available.
Inventors
- 👤 Wolfgang C Forster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:20
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/54; C08G18/546; C08G18/48; C08G18/50; C08G18/5021
Claims Analysis
Total Claims: 0
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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) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |