Patent US2251234A successfully refreshed from Google Patents.
US2251234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and product for removing anions
Assignee: Wyeth Holdings LLC
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Filing: 1940-12-06
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Granted: 1941-07-29
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Expires: 1960-12-06
Abstract
No abstract record available.
Inventors
- 👤 Robert C Swain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:21
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/043; C08G12/046; B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/13; C08G12/26; C08G12/34
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) | 1944-07-28 | 1945-01-27 | 1945-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-07-28 | 1949-01-27 | 1949-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-07-28 | 1953-01-27 | 1953-07-29 | $7700.00 | Window Closed / Lapsed |