Patent US2990430A successfully refreshed from Google Patents.
US2990430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Desulfuration process for preparing symmetrical unsaturated hydrocarbons
Assignee: Eastman Kodak Co
•
Filing: 1959-03-11
•
Granted: 1961-06-27
•
Expires: 1979-03-11
Abstract
No abstract record available.
Inventors
- 👤 Max H Stern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:16
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/32; C07C1/321; C07C1/322
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
THE PROCESS FOR DESULFURATING A SULFUR-CONTAINING DERIVATIVE HAVING THE FORMULA
Claim 2
Dependent Claim
10 words
THE PROCESS FOR DESULFURATING A SULFUR-CONTAINING DERIVATIVE HAVING THE FORMULA
References Cited (Backward Citations)
US2866753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |