US2575337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing device for dry cells
Assignee: Individual
•
Filing: 1950-10-02
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Granted: 1951-11-20
•
Expires: 1970-10-02
Abstract
No abstract record available.
Inventors
- 👤 Grenville B Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:35
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/04; H01M6/06; H01M6/12; H01M50/00; H01M50/50; H01M50/543; H01M50/552; H01M50/559; H01M50/56; H01M6/30; H01M6/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A LEAK-PROOF PRIMARY AKLAKINE DRY CELL COMPRISING A TUBULAR HOUSING OF PLASTIC MATERIAL, AN INWARDLY PROJECTING ANNULAR FLANGE POSITIONED THEREIN, AND ANODIC ELEMENT, A CATHODIC ELEMENT, AN IONICALLY CONDUCTIVE BARRIER DISPOSED BETWEEN SAID ELEMENTS, SAID ELEMENTS BEING CONTAINED IN METAL CUPS, SAID METAL CUPS HAVING A THIN LAYER OF SAID PLASTIC MATERIAL FIRMLY BONDED TO THEIR OUTER SURFACE BUT HAVING EXPOSD CIRCUIT TERMINALS THEREON, THE OPEN ENDS OF SAID METAL CUPS BEING COMPRESSABLY MAINTAINED AGAINST SAID FLANGE AND SAID BARRIER SO AS TO BE IN INTIMATE IONIC CONTACT WITH SAID BARRIER BUT SPACED APART BY THE THICKNESS OF SAID FLANGE, AND THE OPEN ENDS OF SAID HOUSING BEING THERMOPLASTICALLY SEALED TO SAID OUTER SURFACES.
Claim 2
Dependent Claim
114 words
A LEAK-PROOF PRIMARY AKLAKINE DRY CELL COMPRISING A TUBULAR HOUSING OF PLASTIC MATERIAL, AN INWARDLY PROJECTING ANNULAR FLANGE POSITIONED THEREIN, AND ANODIC ELEMENT, A CATHODIC ELEMENT, AN IONICALLY CONDUCTIVE BARRIER DISPOSED BETWEEN SAID ELEMENTS, SAID ELEMENTS BEING CONTAINED IN METAL CUPS, SAID METAL CUPS HAVING A THIN LAYER OF SAID PLASTIC MATERIAL FIRMLY BONDED TO THEIR OUTER SURFACE BUT HAVING EXPOSD CIRCUIT TERMINALS THEREON, THE OPEN ENDS OF SAID METAL CUPS BEING COMPRESSABLY MAINTAINED AGAINST SAID FLANGE AND SAID BARRIER SO AS TO BE IN INTIMATE IONIC CONTACT WITH SAID BARRIER BUT SPACED APART BY THE THICKNESS OF SAID FLANGE, AND THE OPEN ENDS OF SAID HOUSING BEING THERMOPLASTICALLY SEALED TO SAID OUTER SURFACES.
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) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |