US2324746A
Expired / Lapsed
US
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Catalytic isomerization of paraffinic hydrocarbons
Assignee: Gulf Research and Development Co
•
Filing: 1940-08-27
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Granted: 1943-07-20
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Expires: 1960-08-27
Abstract
No abstract record available.
Inventors
- 👤 William W Weinrich
- 👤 James M Yost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:51
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/2206; C07C5/2226; C07C5/2246; C07C5/2253; C07C5/27; C07C5/2702; C07C5/271; C07C5/2718; C07C5/2721; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/125
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) | 1946-07-19 | 1947-01-18 | 1947-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-07-19 | 1951-01-18 | 1951-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-07-19 | 1955-01-18 | 1955-07-20 | $7700.00 | Window Closed / Lapsed |