US2428733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of organic sulfonyl chlorides
Assignee: GAF Chemicals Corp
•
Filing: 1939-05-09
•
Granted: 1947-10-07
•
Expires: 1959-05-09
Abstract
No abstract record available.
Inventors
- 👤 Asinger Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:51
CPC Classifications
C; C07; C07C; C07C309/00; Y; Y10; Y10S; Y10S204/00; Y10S204/902; Y10S204/903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1362355A
Cited
US1963181A
Cited
US2046090A
Cited
USRE20968E
Cited
US2174507A
Cited
US2193824A
Cited
US2202791A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-06 | 1951-04-07 | 1951-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-06 | 1955-04-07 | 1955-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-06 | 1959-04-07 | 1959-10-07 | $7700.00 | Window Closed / Lapsed |