Patent FR2558054A1 successfully refreshed from Google Patents.
US4237202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft battery
Assignee: Teledyne Technologies Inc
•
Filing: 1978-11-13
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Granted: 1980-12-02
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Expires: 1998-11-13
Abstract
Abstract An aircraft battery having a polypropylene casing for receiving the lead plates and acid therein, the casing being configured to fit closely within and be bonded to an aluminum housing and having a thickened base portion with individual cells formed by polypropylene walls to provide improved insulation while maintaining the light weight and the structural integrity of the casing.
Inventors
- 👤 David L. Karpal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:47
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/10; H01M50/102; H01M50/112; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
43 words
An aircraft battery having an external metallic housing, a casing of thin-walled polypropylene material configured to fit tightly within the metallic housing for containing the chemical reactants therein; and means for insulating a portion of the interior of the casing from the housing.
Claim 2
Dependent Claim
43 words
An aircraft battery having an external metallic housing, a casing of thin-walled polypropylene material configured to fit tightly within the metallic housing for containing the chemical reactants therein; and means for insulating a portion of the interior of the casing from the housing.
Claim 3
Dependent Claim
30 words
An aircraft battery as in claim 1 in which said means for insulating a portion of the interior of the casing is structurally affixed to the bottom of said casing.
Claim 4
Dependent Claim
35 words
An aircraft battery as in claim 1 in which said means for insulating a portion of the interior of the casing comprises webs of polypropylene extending from the surface of said casing adjacent said housing.
Claim 5
Dependent Claim
32 words
An aircraft battery as in claim 2 in which said means for insulating a portion of the interior of the casing comprises essentially rectangular walls of polypropylene material extending from said casing.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |