US3420914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsaturated polyester compositions and their preparation
Assignee: Shell USA Inc
•
Filing: 1964-11-13
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Granted: 1969-01-07
•
Expires: 1984-11-13
Abstract
No abstract record available.
Inventors
- 👤 Clayton A May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:39
CPC Classifications
C; C08; C08L; C08L63/00; C08L63/10; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/12; C08F20/16; C09; C09D; C09D4/00; C09D4/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2846410A
Cited
US2824851A
Cited
US2826562A
Cited
US3002959A
Cited
US3156740A
Cited
US3301743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |