US3385839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cation-active copolymers of hydroxyalkyl and primary amino-alkyl acrylates and methacrylates
Assignee: Bayer AG
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Filing: 1964-02-18
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Granted: 1968-05-28
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Expires: 1984-02-18
Abstract
No abstract record available.
Inventors
- 👤 Honig Hans Ludwig
- 👤 Kolb Guenter
- 👤 Theuer Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:55
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/44; D21H17/45; D21H17/455; C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/20; C08F220/34; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/263; D06M15/267; Y; Y10; Y10S; Y10S526/00; Y10S526/915; Y10S526/923
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
34 words
A PROCESS FOR THE PRODUCTION OF HYDROPHILIC, CATIONACTIVE POLYMERIC MATERIALS WHICH COMPRISES COPOLYMERIZING WITH AN ACTIVE AMOUNT OF A FREE RADICAL FORMING CATALYST, (A) 1-99 PERCENT BY WEIGHT OF A MONOMER OF 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) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |