Patent US2380827A successfully refreshed from Google Patents.
US3352801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sequestering ion exchange resins
Assignee: Individual
•
Filing: 1964-03-16
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Granted: 1967-11-14
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Expires: 1984-03-16
Abstract
No abstract record available.
Inventors
- 👤 Le Roy A White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:16
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/0233
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
AN ION EXCHANGE CHELATING RESIN HAVING A PLURALITY OF REPEATING UNITS THEREIN HAVING THE FORMULA
Claim 2
Dependent Claim
15 words
AN ION EXCHANGE CHELATING RESIN HAVING A PLURALITY OF REPEATING UNITS THEREIN HAVING THE FORMULA
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) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |