Patent US2145369A successfully refreshed from Google Patents.
US2145369A
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Substituted aryl sulphonic acids and processes of making the same
Assignee: Hercules Powder Co
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Filing: 1938-06-17
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Granted: 1939-01-31
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Expires: 1958-06-17
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Osterhof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:50
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/02; C07C303/04; C07C303/08; C07C309/00; C07C2601/00; C07C2601/12; C07C2601/16; C07C2602/00; C07C2602/36; C07C2602/42; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03
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) | 1942-01-30 | 1942-08-01 | 1943-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-01-30 | 1946-08-01 | 1947-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-01-30 | 1950-08-01 | 1951-01-31 | $7700.00 | Window Closed / Lapsed |