US2586883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable combination of cation- and anion-exchange resins
Assignee: Wyeth Holdings LLC
•
Filing: 1947-06-02
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Granted: 1952-02-26
•
Expires: 1967-06-02
Abstract
No abstract record available.
Inventors
- 👤 Stroh Grace Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:53
CPC Classifications
B; B01; B01J; B01J43/00; Y; Y10; Y10S; Y10S525/00; Y10S525/919
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US576452A
Cited
US2228159A
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US2404367A
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US2461505A
Cited
US2469683A
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US2451272A
Cited
US2474322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |