US2251940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulphonic derivatives
Assignee: EMULSOL Corp
•
Filing: 1939-07-07
•
Granted: 1941-08-12
•
Expires: 1959-07-07
Abstract
No abstract record available.
Inventors
- 👤 Katzman Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:33
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/02; C07C309/03; C07C309/17; C07C309/18; A; A01; A01N; A01N41/00; A01N41/02; A01N41/04; C09; C09K; C09K23/00; C09K23/04; C11; C11D; C11D1/00
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) | 1944-08-11 | 1945-02-10 | 1945-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-08-11 | 1949-02-10 | 1949-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-08-11 | 1953-02-10 | 1953-08-12 | $7700.00 | Window Closed / Lapsed |