US3385795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxide polymerization catalysts and their preparation
Assignee: Aerojet Rocketdyne Holdings Inc
•
Filing: 1967-01-31
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Granted: 1968-05-28
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Expires: 1987-01-31
Abstract
No abstract record available.
Inventors
- 👤 Richard R Durst
- 👤 Wendell O Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:08
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/0201; B01J31/0211; B01J31/26; B01J31/28; B01J31/30; C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/2645; C08G65/2654; C08G65/269; B01J2231/00; B01J2231/10; B01J2531/00; B01J2531/02; B01J2531/0213; B01J2531/0219; B01J2531/10; B01J2531/16; B01J2531/20; B01J2531/26; B01J2531/30; B01J2531/31; B01J27/00; B01J27/06; B01J27/08; B01J27/138
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2491116A
Cited
US2440750A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |