US2467523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anion exchange resins
Assignee: Wyeth Holdings LLC
•
Filing: 1945-12-29
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Granted: 1949-04-19
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Expires: 1965-12-29
Abstract
No abstract record available.
Inventors
- 👤 James R Dudley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:35
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/0273; B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/13; Y; Y10; Y10S; Y10S71/00; Y10S71/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-18 | 1952-10-18 | 1953-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-18 | 1956-10-18 | 1957-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-18 | 1960-10-18 | 1961-04-19 | $7700.00 | Window Closed / Lapsed |