Patent US3635915A successfully refreshed from Google Patents.
US3635915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of maleic acid and acrylic acid
Assignee: Deering Milliken Research Corp
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Filing: 1969-11-28
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Granted: 1972-01-18
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Expires: 1989-11-28
Abstract
Abstract COPOLYMER OF MALERIC ACID AND ARCYLIC ACID ARE PREPARED BY POLYMERIZING A MIXTURE OF MALEIC ACID AND ACRYLIC ACID IN WATER IN TEH PRESENC OF A POLYMERIZATION CATALYST. THE COPOLYMERS PRODUCED IN THIS MANNER ARE WATERSOLUBLE, CLEAR AND FLEXIBLE, AND AE USEFUL AS SURFACE COATINGS. THE COPOLYMERS ARE PARTICULARLY USEFUL AS TEXTILE SIZING COMPOSITIONS FOR FILTERS AND YARNS.
Inventors
- 👤 Donald J Gale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:13
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/263; C; C08; C08F; C08F22/00; C08F220/00; C08F220/02; C08F220/04; C08F220/06; Y; Y10; Y10S; Y10S526/00; Y10S526/937
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |