Patent US3709737A successfully refreshed from Google Patents.
US3709737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leakproof battery and method of manufacturing the same
Assignee: Yuasa Corp
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Filing: 1970-09-30
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Granted: 1973-01-09
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Expires: 1990-09-30
Abstract
Abstract This invention relates to a method of manufacturing a leakproof battery, the battery being of the construction in which a composition of a mixture of hydrated silica gel with thermoplastic synthetic resin is placed around a plate group, heated in saturated steam above 100*C and solidified into a liquid absorbable porous body integral with the plate group, and the liquid absorbable porous body is impregnated with an electrolyte and mounted in a battery container. Alternatively, the battery container itself can be used as the mold.
Inventors
- 👤 T Fujimoto
- 👤 K Kuroda
- 👤 A Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:13
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/06; H01M10/08; H01M10/10; H01M10/12; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
29 words
A method according to claim 1 wherein said mixture comprises one part by weight of high density polyethylene powder and three parts by weight of hydrated silica gel powder.
Claim 2
Dependent Claim
27 words
A method as in claim 1 wherein said integrated liquid absorbable porous body is dried in hot air below 100* C prior to impregnating with an electrolyte.
Claim 3
Independent Claim
97 words
A method of manufacturing a leakproof battery comprising the steps of forming a mixture of thermoplastic synthetic resin powder and hydrated silica gel around a group of positive and negative plates within the battery container; heating said battery container in saturated steam at a temperature of over 100* C, said temperature being sufficiently high to soften and melt at least a portion of said resin powder; solidifying said resin to form a liquid absorbable porous body integrally formed with said positive and negative plates within said battery container; and impregnating said absorbable porous body with an electrolyte.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |