US2085535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the polymerization of unsaturated hydrocarbons
Assignee: Shell Development Co
•
Filing: 1936-01-04
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Granted: 1937-06-29
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Expires: 1956-01-04
Abstract
No abstract record available.
Inventors
- 👤 Langedijk Siegfried Leonard
- 👤 Adrianus Johannes Van Peski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:39
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; C07C2/20; C07C2/22; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/125; C07C2527/126; C07C2531/00; C07C2531/02
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) | 1940-06-28 | 1940-12-28 | 1941-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-06-28 | 1944-12-28 | 1945-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-06-28 | 1948-12-28 | 1949-06-29 | $7700.00 | Window Closed / Lapsed |