US2408615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cation exchange resins and production thereof
Assignee: Wyeth Holdings LLC
•
Filing: 1944-03-30
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Granted: 1946-10-01
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Expires: 1964-03-30
Abstract
No abstract record available.
Inventors
- 👤 James R Dudley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:27
CPC Classifications
C; C08; C08G; C08G75/00; B; B01; B01J; B01J39/00; B01J39/08; B01J39/16; B01J39/18; B01J39/19; C08G79/00; C08G79/02; C08G79/04
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) | 1949-09-30 | 1950-04-01 | 1950-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-09-30 | 1954-04-01 | 1954-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-09-30 | 1958-04-01 | 1958-10-01 | $7700.00 | Window Closed / Lapsed |