Patent US3004932A successfully refreshed from Google Patents.
US3004932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsaturated beta-diketones and polymers and co-polymers thereof
Assignee: Dow Chemical Co
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Filing: 1958-01-15
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Granted: 1961-10-17
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Expires: 1978-01-15
Abstract
No abstract record available.
Inventors
- 👤 Despic Aleksander
- 👤 Kosanovic Djuro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:08
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/20; C07C49/227; C07C45/00; C07C45/45; C07C45/46; C07C49/203
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
19 words
AN ION-EXCHANGE RESIN CONSISTING OF A POLYMER OF METHACRYLYL ACETONE, WHICH RESIN POSSESSES A COMPLEXING AFFINITY FOR FERRIC IONS.
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) | 1964-10-16 | 1965-04-17 | 1965-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-16 | 1969-04-17 | 1969-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-16 | 1973-04-17 | 1973-10-17 | $7700.00 | Window Closed / Lapsed |