US2529142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resinous composition suitable for anion exchange
Assignee: Wyeth Holdings LLC
•
Filing: 1946-02-20
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Granted: 1950-11-07
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Expires: 1966-02-20
Abstract
No abstract record available.
Inventors
- 👤 James R Dudley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:24
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/26; C08G12/34; B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/13; Y; Y10; Y10S; Y10S260/00; Y10S260/14; Y10S71/00; Y10S71/903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2228514A
Cited
FR898175A
Cited
US2285750A
Cited
US2251234A
Cited
US2341907A
Cited
US2388235A
Cited
GB566789A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |