US2293353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the polymerization of olefins
Assignee: Shell Development Co
•
Filing: 1937-04-19
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Granted: 1942-08-18
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Expires: 1957-04-19
Abstract
No abstract record available.
Inventors
- 👤 Richard Z Moravec
- 👤 William T Schelling
- 👤 Charles F Oldershaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:48
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; C07C2/16; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/054
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-08-17 | 1946-02-16 | 1946-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-08-17 | 1950-02-16 | 1950-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-08-17 | 1954-02-16 | 1954-08-18 | $7700.00 | Window Closed / Lapsed |