US3275478A
Expired / Lapsed
US
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Method of making a battery separator containing colloidal metal
Assignee: FMC Corp
•
Filing: 1965-03-18
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Granted: 1966-09-27
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Expires: 1985-03-18
Abstract
No abstract record available.
Inventors
- 👤 Charles M Rosser
- 👤 Richard A Glinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:30
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/429; H01M50/414; H01M50/423; H01M50/449; H01M50/451; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A METHOD OF PREPARING SEMI-PREMEABLE BATTERY SEPARATOR WHICH COMPRISES IMMERSING A FILM OF REGENERATED CELLULOSE IN A DILUTE AQUEOUS SOLUTION OF A WATERSOLUBLE SALT OF A METAL SELECTED FROM THE GROUP CONSISTING OF SILVER AND GOLD FOR AT LEAST ABOUT 0.1 MINUTE, THEN IMMERSING SAID FILM IN A DILUTE AQUEOUS ALKALINE BATH
Claim 2
Independent Claim
52 words
A METHOD OF PREPARING SEMI-PREMEABLE BATTERY SEPARATOR WHICH COMPRISES IMMERSING A FILM OF REGENERATED CELLULOSE IN A DILUTE AQUEOUS SOLUTION OF A WATERSOLUBLE SALT OF A METAL SELECTED FROM THE GROUP CONSISTING OF SILVER AND GOLD FOR AT LEAST ABOUT 0.1 MINUTE, THEN IMMERSING SAID FILM IN A DILUTE AQUEOUS ALKALINE BATH
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |