US3539660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing a thermoset composition based on carboxy copolymers,epoxides,and bicyclic fused tertiary amines
Assignee: Hi Tek Polymers Inc
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Filing: 1967-07-28
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Granted: 1970-11-10
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Expires: 1987-07-28
Abstract
No abstract record available.
Inventors
- 👤 Darrell D Hicks
- 👤 Gene E Schroll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:16
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/686; B; B82; B82Y; B82Y10/00; C08L; C08L57/00; C08L63/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3366718A
Cited
US3396641A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |