Patent US2028091A successfully refreshed from Google Patents.
US2028091A
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Esters of sulphodicarboxylic acids
Assignee: Wyeth Holdings LLC
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Filing: 1933-07-28
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Granted: 1936-01-14
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Expires: 1953-07-28
Abstract
No abstract record available.
Inventors
- 👤 Alphons O Jaeger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:42
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/02; C07C309/03; C07C309/17; C11; C11D; C11D1/00; C11D1/02; C11D1/12; C11D1/28; C10; C10M; C10M2219/00; C10M2219/04; C10M2219/044; C10N; C10N2040/00; C10N2040/46; C10N2050/00; C10N2050/015; C10N2050/02; C10N2050/10; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/04
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) | 1939-01-13 | 1939-07-15 | 1940-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-01-13 | 1943-07-15 | 1944-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-01-13 | 1947-07-15 | 1948-01-14 | $7700.00 | Window Closed / Lapsed |