US2275378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyalkylene ether disulphonyl halides and a process of making them
Assignee: Rohm and Haas Co
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Filing: 1937-09-10
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Granted: 1942-03-03
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Expires: 1957-09-10
Abstract
No abstract record available.
Inventors
- 👤 Johnson Treat Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:49
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/78; C07C309/79; C07C309/82; C07C309/80
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) | 1945-03-02 | 1945-09-01 | 1946-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-03-02 | 1949-09-01 | 1950-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-03-02 | 1953-09-01 | 1954-03-03 | $7700.00 | Window Closed / Lapsed |