Patent US2314458A successfully refreshed from Google Patents.
US2314458A
Expired / Lapsed
US
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Polymerizing olefins
Assignee: Standard Oil Development Co
•
Filing: 1938-09-30
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Granted: 1943-03-23
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Expires: 1958-09-30
Abstract
No abstract record available.
Inventors
- 👤 Eldon E Stahly
- 👤 Frank B Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:05
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; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/901
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) | 1946-03-22 | 1946-09-21 | 1947-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-03-22 | 1950-09-21 | 1951-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-03-22 | 1954-09-21 | 1955-03-23 | $7700.00 | Window Closed / Lapsed |