US3402135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urethane crude processing aid
Assignee: ATK Launch Systems LLC
•
Filing: 1967-05-12
•
Granted: 1968-09-17
•
Expires: 1987-05-12
Abstract
No abstract record available.
Inventors
- 👤 Joseph L Schwartz
- 👤 Harold L Elkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:36
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/675; C08K; C08K5/00; C08K5/04; C08K5/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2333922A
Cited
US2844554A
Cited
US2872430A
Cited
GB852379A
Cited
US3015636A
Cited
US3115481A
Cited
US3130175A
Cited
US3227663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |