US2697079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion-exchange resins containing quaternary ammonium hydroxide groups
Assignee: Beazer East Inc
•
Filing: 1951-12-05
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Granted: 1954-12-14
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Expires: 1971-12-05
Abstract
No abstract record available.
Inventors
- 👤 Alelio Gaetano F D
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:31
CPC Classifications
C; C08; C08F; C08F26/00; C08F26/02; B; B01; B01J; B01J41/00; B01J41/04; B01J41/08; B01J41/12; B01J41/14; C08F8/00; C08F8/04; C08F8/44; C08F2800/00; C08F2800/20; C08F2810/00; C08F2810/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A WATER-INSOLUBLE RESIN COMPRISING A POLYMER HAVING A PLURALITY OF REPEATING UNITS HAVING THE STRUCTURE
Claim 2
Dependent Claim
15 words
A WATER-INSOLUBLE RESIN COMPRISING A POLYMER HAVING A PLURALITY OF REPEATING UNITS HAVING THE STRUCTURE
References Cited (Backward Citations)
US2228514A
Cited
US2366008A
Cited
US2456428A
Cited
US2481768A
Cited
US2591573A
Cited
US2543666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-13 | 1958-06-14 | 1958-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-13 | 1962-06-14 | 1962-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-13 | 1966-06-14 | 1966-12-14 | $7700.00 | Window Closed / Lapsed |