US3037899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing microporous filtering diaphragms for storage batteries
Assignee: Individual
•
Filing: 1958-04-18
•
Granted: 1962-06-05
•
Expires: 1978-04-18
Abstract
No abstract record available.
Inventors
- 👤 Vedovelli Mario
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:33
CPC Classifications
C; C25; C25B; C25B13/00; C25B13/02; H; H01; H01M; H01M50/00; H01M50/40; H01M50/403; H01M50/406; H01M50/409; H01M50/411; H01M50/429; H01M50/4295; H01M50/44; H01M50/446; H01M50/489; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A PROCESS FOR MANUFACTURING MICROPOROUS FILTERING DIAPHRAGMS FOR STORAGE BATTERIES AND ELECTROLYTIC CELLS COMPRISING THE STEPS OF APPLYING A POLYMERIZABLE BINDER TO A MAIN SHEET OF MATERIAL CONSISTING OF ACID PROOF FIBERS WEIGHING 30 TO 40 GRAMS PER SQUARE METER TOP FORM A MACHORPOUS STRUCTURE, PLACING A THIN ABSORBENT SHEET OF CELLULOSIC MATERIAL WEIGHING 30 TO 50 GRAMS PER SQUARE METER AND HAVING A MICROPOROUS CONFIGURATION IN CONTACT WITH SAID MAIN SHEET OF MATERIAL, COMPRESSING SAID MAIN SHEET OF MATERIAL AND SAID CELLULOSIC SHEET OF MATERIAL TOGETHER SO THAT SAID BINDER IS ADSORBED BY SAID CELLULOSIC SHEET OF MATERIAL TO CAUSE SAID CELLULOSIC SHEET OF MATERIAL TO ADHERE TO SAID MAIN SHEET OF MATERIAL TO FORM A THIN COMPOSITE SHEET OF STRUCTURE WHILE SIMULTANOUSLY FORMING RIBS AT SPACED INTERVALS THEREIN, DRYING SAID COMPOSITE SHEET, AND THEN POLYMERIZING SAID BINDER.
Claim 2
Dependent Claim
139 words
A PROCESS FOR MANUFACTURING MICROPOROUS FILTERING DIAPHRAGMS FOR STORAGE BATTERIES AND ELECTROLYTIC CELLS COMPRISING THE STEPS OF APPLYING A POLYMERIZABLE BINDER TO A MAIN SHEET OF MATERIAL CONSISTING OF ACID PROOF FIBERS WEIGHING 30 TO 40 GRAMS PER SQUARE METER TOP FORM A MACHORPOUS STRUCTURE, PLACING A THIN ABSORBENT SHEET OF CELLULOSIC MATERIAL WEIGHING 30 TO 50 GRAMS PER SQUARE METER AND HAVING A MICROPOROUS CONFIGURATION IN CONTACT WITH SAID MAIN SHEET OF MATERIAL, COMPRESSING SAID MAIN SHEET OF MATERIAL AND SAID CELLULOSIC SHEET OF MATERIAL TOGETHER SO THAT SAID BINDER IS ADSORBED BY SAID CELLULOSIC SHEET OF MATERIAL TO CAUSE SAID CELLULOSIC SHEET OF MATERIAL TO ADHERE TO SAID MAIN SHEET OF MATERIAL TO FORM A THIN COMPOSITE SHEET OF STRUCTURE WHILE SIMULTANOUSLY FORMING RIBS AT SPACED INTERVALS THEREIN, DRYING SAID COMPOSITE SHEET, AND THEN POLYMERIZING SAID BINDER.
References Cited (Backward Citations)
US1295660A
Cited
US2043954A
Cited
US2117371A
Cited
GB678719A
Cited
US2523022A
Cited
US2607810A
Cited
US2767113A
Cited
US2758630A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-04 | 1965-12-04 | 1966-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-04 | 1969-12-04 | 1970-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-04 | 1973-12-04 | 1974-06-05 | $7700.00 | Window Closed / Lapsed |