Patent US3682583A successfully refreshed from Google Patents.
US3682583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of removing polyvinyl alcohol containing size
Assignee: Shell USA Inc
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Filing: 1971-05-12
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Granted: 1972-08-08
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Expires: 1991-05-12
Abstract
Abstract POLYVINYL ALCOHOL-CONTAINING SIZE IS REMOVED FROM FABRICS BY APPLYING A SOLUTION CONSISTING ESSENTIALLY OF WATER AND HYDROGEN PEROXIDE AND HAVING A PH OF NOT GREATER THAN 9 AND PREFERABLY CONTAINING A WETTING AGENT.
Inventors
- 👤 Louis Kravetz
- 👤 Gerald R Ferrante
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:47
CPC Classifications
D; D06; D06L; D06L1/00; D06L1/12; D06L1/14
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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |