US3087920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold-water-soluble polyvinyl alcohol
Assignee: Kurashiki Rayon Co Ltd
•
Filing: 1960-10-07
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Granted: 1963-04-30
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Expires: 1980-10-07
Abstract
No abstract record available.
Inventors
- 👤 Suzumura Hideo
- 👤 Miyahara Hisao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:58
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
61 words
A COLD-WATER-SOLUBLE POLYVINYL ALCOHOL WHICH COMPRISES AN INTIMATE ADMIXTURE OF 100 PARTS BY WEIGHT OF A PARTIALLY SAPONIFIED POLYVINYL ALCOHOL HAVING A HYDROLYSIS OF 75 TO 90 PERCENT AND A PARTICLE SIZE NOT EXCEEDING 50 MESH, 0.5 TO 5 PARTS BY WEIGHT O A DIAMINOSTIBENE DISULFONIC ACID SODIUM SALT, AND 1 TO 3 PARTS BY WEIGHT OF A SURFACE ACTIVE AGENT.
References Cited (Backward Citations)
US1971662A
Cited
US2362026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |