Patent US2196985A successfully refreshed from Google Patents.
US2196985A
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Alkyl hydroxy aromatic sulphonates
Assignee: National Aniline and Chemical Co Inc
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Filing: 1934-07-31
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Granted: 1940-04-16
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Expires: 1954-07-31
Abstract
No abstract record available.
Inventors
- 👤 Lawrence H Flett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:19
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/16; C07D215/20; C07D215/24; C07D215/26; C07C; C07C309/00; C07C309/01; C07C309/28; C07C309/41; C07C309/42; C07C37/00; C07C37/11; C07C37/20; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S71/00; Y10S71/903
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) | 1943-04-16 | 1943-10-16 | 1944-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-04-16 | 1947-10-16 | 1948-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-04-16 | 1951-10-16 | 1952-04-16 | $7700.00 | Window Closed / Lapsed |