Patent US4448859A successfully refreshed from Google Patents.
US4448859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deactivation of thionyl chloride cells
Assignee: United States, UNITED STATES AIR FORCE, Secretary of
•
Filing: 1983-06-14
•
Granted: 1984-05-15
•
Expires: 2003-06-14
Abstract
Abstract Thionyl chloride cells are deactivated by introducing a solution of aluminum chloride in thionyl chloride into the cell.
Inventors
- 👤 Wayne S. Bishop
- 👤 Richard A. Marsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:00
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/50; H01M6/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
75 words
A method for deactivating a thionyl chloride cell which comprises the steps of: (a) electrically discharging that said cell; (b) introducing a solution of aluminum chloride dissolved in thionyl chloride into said cell; (c) allowing said solution to react with the negative active material in said cell; (d) withdrawing at least a portion of said solution from said cell; and (e) repeating steps (b), (c) and (d) until the desired degree of deactivation is achieved.
Claim 2
Independent Claim
75 words
A method for deactivating a thionyl chloride cell which comprises the steps of: (a) electrically discharging that said cell; (b) introducing a solution of aluminum chloride dissolved in thionyl chloride into said cell; (c) allowing said solution to react with the negative active material in said cell; (d) withdrawing at least a portion of said solution from said cell; and (e) repeating steps (b), (c) and (d) until the desired degree of deactivation is achieved.
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein the concentration of aluminum chloride in said solution ranges from 0.05 to 2.0 molar.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein the concentration of aluminum chloride in said solution is about 1.0 to 1.5 molar.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein said negative active material is lithium.
Claim 6
Dependent Claim
12 words
The method of claim 1 wherein said negative active material is calcium.
Claim 7
Independent Claim
69 words
A method for deactivating a thionyl chloride cell which comprises the steps of: (a) introducing a solution of aluminum chloride dissolved in thionyl chloride into said cell; (b) allowing said solution to react with the negative active material in said cell; (c) withdrawing at least a portion of said solution from said cell, and (d) repeating steps (a), (b) and (c) until the desired degree of deactivation is achieved.
Claim 8
Independent Claim
69 words
A method for deactivating a thionyl chloride cell which comprises the steps of: (a) introducing a solution of aluminum chloride dissolved in thionyl chloride into said cell; (b) allowing said solution to react with the negative active material in said cell; (c) withdrawing at least a portion of said solution from said cell, and (d) repeating steps (a), (b) and (c) until the desired degree of deactivation is achieved.
Claim 9
Dependent Claim
20 words
The method of claim 6 wherein the concentration of aluminum chloride in said solution ranges from 0.05 to 2.0 molar.
Claim 10
Dependent Claim
20 words
The method of claim 6 wherein the concentration of aluminum chloride in said solution is about 1.0 to 1.5 molar.
Claim 11
Dependent Claim
12 words
The method of claim 6 wherein said negative active material is lithium.
Claim 12
Dependent Claim
12 words
The method of claim 6 wherein said negative active material is calcium.
References Cited (Backward Citations)
US4098961A
Cited
US4309490A
Cited
US4228229A
Cited
US4190704A
Cited
US4403021A
Cited
US4355086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |