Patent US3284382A successfully refreshed from Google Patents.
US3284382A
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Polyvinyl butyral resin modified cellulose battery separator and method for preparation
Assignee: FMC Corp
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Filing: 1962-05-11
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Granted: 1966-11-08
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Expires: 1982-05-11
Abstract
No abstract record available.
Inventors
- 👤 Charles M Rosser
- 👤 Richard A Glinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:15
CPC Classifications
C; C08; C08L; C08L1/00; H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M50/429; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
16 words
A NON-FIBROUS REGENERATED CELLULOSE SHEET HAVING UNIFORMLY DISPERSED THEREIN A MINOR PROPORTION OF POLYVINYL BUTYRAL RESIN.
Claim 2
Dependent Claim
16 words
A NON-FIBROUS REGENERATED CELLULOSE SHEET HAVING UNIFORMLY DISPERSED THEREIN A MINOR PROPORTION OF POLYVINYL BUTYRAL RESIN.
Claim 3
Independent Claim
35 words
A METHOD OF MAKING AN OXIDATION-RESISTANT CELLULOSE SHEET WHICH COMPRISES CASTING A SHEET OF COLLODION CONTAINING POLYVINYL BUTYRAL RESIN, REMOVING THE SOLVENT, DENITRATING THE CELLULOSE NITRATE IN A DEOXIDIZING BATH, WASHING, AND DRYING SAID SHEET.
Claim 4
Independent Claim
35 words
A METHOD OF MAKING AN OXIDATION-RESISTANT CELLULOSE SHEET WHICH COMPRISES CASTING A SHEET OF COLLODION CONTAINING POLYVINYL BUTYRAL RESIN, REMOVING THE SOLVENT, DENITRATING THE CELLULOSE NITRATE IN A DEOXIDIZING BATH, WASHING, AND DRYING SAID SHEET.
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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |