Patent US2205159A successfully refreshed from Google Patents.
US2205159A
Expired / Lapsed
US
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Polymerization of olefins
Assignee: Gulf Research and Development Co
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Filing: 1936-10-22
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Granted: 1940-06-18
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Expires: 1956-10-22
Abstract
No abstract record available.
Inventors
- 👤 Donald R Stevens
- 👤 William A Gruse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:02
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; C07C2/16; C07C2/26; C07C2521/00; C07C2521/02; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/054; C07C2531/00; C07C2531/02; C07C2531/025; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/952
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) | 1943-06-18 | 1943-12-18 | 1944-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-06-18 | 1947-12-18 | 1948-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-06-18 | 1951-12-18 | 1952-06-18 | $7700.00 | Window Closed / Lapsed |