US2376675A
Expired / Lapsed
US
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Process for catalyzed abnormal addition reactions
Assignee: Shell Development Co
•
Filing: 1942-02-23
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Granted: 1945-05-22
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Expires: 1962-02-23
Abstract
No abstract record available.
Inventors
- 👤 Theodore W Evans
- 👤 William E Vaughan
- 👤 Frederick F Rust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:15
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B01J19/122; B01J19/123; C; C07; C07C; C07C17/00; C07C17/07; C07C17/08; Y; Y10; Y10S; Y10S204/00; Y10S204/902; Y10S204/909
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) | 1948-05-21 | 1948-11-20 | 1949-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-05-21 | 1952-11-20 | 1953-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-05-21 | 1956-11-20 | 1957-05-22 | $7700.00 | Window Closed / Lapsed |