US3733292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrolysis of maleic anhydride copolymers
Assignee: Indopco Inc
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Filing: 1971-11-18
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Granted: 1973-05-15
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Expires: 1991-11-18
Abstract
Abstract PRESSURE SENSITIVE ADHESIVE COMPOSITION AND SUBSTRATES COATED THEREWITH, SAID PRESSURE SENSITIVE ADHESIVE COMPOSITIONS COMPRISING LACQUERS OF MALEIC ANHYDRIDE CONTAINING COPOLYMERS WHEREIN AT LEAST PART OF THE MALEIC ANHYDRIDE MOIETIES HAVE BEEN HYDROLYZED TO THE ACID STATE A METHOD FOR EFFECTING SAID HYDROLYSIS WHICH INVOLVED THE USE OF A MIXTURE OF WATER AND A WATER MISCIBLE ORGANIC SOLVENT AS THE HYDROLYZING REAGENT IS DESCRIBED, SAID METHOD ENABLING THE PRODUCTION OF NOVEL HYDROLYZED MALEIC ANHYDRIDE COPOLYMERS.
Inventors
- 👤 J Sirota
- 👤 I Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:08
CPC Classifications
C; C09; C09J; C09J157/00; C09J157/04; C08; C08F; C08F8/00; C08L; C08L2666/00; C08L2666/28
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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |