US4634479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power source utilizing encapsulated lithium pellets and method of making such pellets
Assignee: Sundstrand Corp
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Filing: 1984-06-08
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Granted: 1987-01-06
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Expires: 2004-06-08
Abstract
Abstract Encapsulated lithium including a shot shaped and sized body (10) of lithium metal encapsulated in a thin layer (12) of a predominantly fluorine substituted polyolefin based polymeric material, a method of making the same and a power plant utilizing the encapsulated lithium as fuel (FIG. 3).
Inventors
- 👤 John T. Buford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:34
CPC Classifications
C; C10; C10L; C10L5/00; C10L5/40; B; B01; B01J; B01J13/00; B01J13/02; B01J13/04; Y; Y02; Y02E; Y02E50/00; Y02E50/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
66 words
Encapsulated lithium based fuel consisting essentially of: a shot shaped body of metallic lithium having a nominal diameter in the approximate range of 1-25 mm; and a coating encapsulating said body and formed of a thin layer of predominantly fluorine substituted polymeric or telomeric material, said material exothermally reacting with the lithium of said body at temperatures approximately at or above the melting point of lithium.
Claim 2
Dependent Claim
66 words
Encapsulated lithium based fuel consisting essentially of: a shot shaped body of metallic lithium having a nominal diameter in the approximate range of 1-25 mm; and a coating encapsulating said body and formed of a thin layer of predominantly fluorine substituted polymeric or telomeric material, said material exothermally reacting with the lithium of said body at temperatures approximately at or above the melting point of lithium.
Claim 3
Dependent Claim
13 words
The lithium fuel of claim 1 wherein said material is a tetrafluoroethylene telomer.
Claim 4
Dependent Claim
36 words
The lithium based fuel of claim 2 wherein the metallic lithium constitutes about 60-86 weight percent and the telomer constitutes about 40-14 weight percent, said coating having a nominal thickness of about 0.060 inches or less.
Claim 5
Dependent Claim
17 words
The encapsulated lithium of claim 1 wherein lithium metal constitutes 60-86 weight percent of the encapsulated lithium.
Claim 6
Dependent Claim
24 words
The encapsulated lithium of claim 1 wherein said polymeric material is selected from the group consisting of polyperfluoroalkoxy, polytetrafluoroethylene, tetrafluoroethylene telomers, and mixtures thereof.
References Cited (Backward Citations)
US3351505A
Cited
US3441455A
Cited
US3788906A
Cited
GB1006753A
Cited
US3379178A
Cited
US3565706A
Cited
US3791889A
Cited
NL7308416A
Cited
US3963541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-05 | 1990-07-07 | 1991-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-05 | 1994-07-07 | 1995-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-05 | 1998-07-07 | 1999-01-06 | $7700.00 | Window Closed / Lapsed |