US2569159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas permeable coating for dry cell flashlight batteries
Assignee: Individual
•
Filing: 1947-01-09
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Granted: 1951-09-25
•
Expires: 1967-01-09
Abstract
No abstract record available.
Inventors
- 👤 Gelardin Benjamin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:34
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/04; H01M6/06; H01M6/08; H01M50/00; H01M50/10; H01M50/116; H01M50/117; H01M50/119; H01M50/121; H01M50/124; H01M50/126; H01M50/129; H01M50/131; H01M50/133
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
IN A DRY CELL, A ZINC CONTAINER ELECTRODE AND A GAS-PERMEABLE COATING FORMED OF TWO DIFFERENT PLASTIC MATERIALS SUPERIMPOSED UPON EACH OTHER AND UPON THE EXTERIOR SURFACE OF THE SIDES OF THE CONTAINER ELECTRODE AND COMPRISING A LAYER OF NITROCELLULOSE AND A LAYER OF ETHYL CELLULOSE ADHERENT TO THE FIRST-NAMED LAYER, THE COMPOSITE COATING BEING BETWEEN 0.001 TO 0.010" IN THICKNESS, ONE OF SAID LAYERS BEING ADHERENT TO THE CONTAINER ELECTRODE.
Claim 2
Dependent Claim
71 words
IN A DRY CELL, A ZINC CONTAINER ELECTRODE AND A GAS-PERMEABLE COATING FORMED OF TWO DIFFERENT PLASTIC MATERIALS SUPERIMPOSED UPON EACH OTHER AND UPON THE EXTERIOR SURFACE OF THE SIDES OF THE CONTAINER ELECTRODE AND COMPRISING A LAYER OF NITROCELLULOSE AND A LAYER OF ETHYL CELLULOSE ADHERENT TO THE FIRST-NAMED LAYER, THE COMPOSITE COATING BEING BETWEEN 0.001 TO 0.010" IN THICKNESS, ONE OF SAID LAYERS BEING ADHERENT TO THE CONTAINER ELECTRODE.
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) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |