US3293248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isocyanurate-trianhydride polymer
Assignee: SI Group Inc
•
Filing: 1964-12-04
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Granted: 1966-12-20
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Expires: 1984-12-04
Abstract
No abstract record available.
Inventors
- 👤 Howard E Sheffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:06
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/307; C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4223; C08G59/4238; C08G73/00; C08G73/06; C08G73/10; C08G73/16; C09; C09D; C09D161/00; C09D161/20; H01B3/303; H01B3/306
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3140299A
Cited
US3182073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |