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Patent US3409550A successfully refreshed from Google Patents.
US3409550A
Expired / Lapsed
US
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Fire retardant compositions
Assignee: Shell USA Inc
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Filing: 1965-12-30
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Granted: 1968-11-05
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Expires: 1985-12-30
Abstract
No abstract record available.
Inventors
- 👤 Lincoln E Gould
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:26
CPC Classifications
A; A62; A62D; A62D1/00; A62D1/0028; A62D1/0035
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2941953A
Cited
GB945702A
Cited
US3249534A
Cited
US3293189A
Cited
US3196108A
Cited
US3334045A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |