Patent US3412050A successfully refreshed from Google Patents.
US3412050A
Expired / Lapsed
US
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Coal tar prepolymers and the cure products thereof
Assignee: ATK Launch Systems LLC
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Filing: 1966-07-19
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Granted: 1968-11-19
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Expires: 1986-07-19
Abstract
No abstract record available.
Inventors
- 👤 Harold L Elkin
- 👤 Pugh Chauncey C De
- 👤 Joseph L Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:29
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6476
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE855911C
Cited
US3182032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |