US2315375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulpho - tricarboxylic acid compounds and process of preparing same
Assignee: GAF Chemicals Corp
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Filing: 1939-01-04
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Granted: 1943-03-30
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Expires: 1959-01-04
Abstract
No abstract record available.
Inventors
- 👤 Nawiasky Paul
- 👤 Sprenger Gerhard Ewald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:48
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/02; C07C309/03; C07C309/17; C11; C11D; C11D1/00; C11D1/02; C11D1/12; C11D1/123
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) | 1946-03-29 | 1946-09-28 | 1947-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-03-29 | 1950-09-28 | 1951-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-03-29 | 1954-09-28 | 1955-03-30 | $7700.00 | Window Closed / Lapsed |