US2438092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nu-sulfodicarboxylic acid aspartates
Assignee: Wyeth Holdings LLC
•
Filing: 1943-09-10
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Granted: 1948-03-16
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Expires: 1963-09-10
Abstract
No abstract record available.
Inventors
- 👤 Kathryn L Lynch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:51
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/02; C07C309/03; C07C309/17; C07C309/18; C14; C14C; C14C3/00; C14C3/02; C14C3/04; C14C3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2028091A
Cited
US2200220A
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US2252401A
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US2306095A
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US2238902A
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US2322783A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-16 | 1951-09-15 | 1952-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-16 | 1955-09-15 | 1956-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-16 | 1959-09-15 | 1960-03-16 | $7700.00 | Window Closed / Lapsed |