US3725153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mass which after ignition supplies heat for some time as a result of a reaction among several constituents of the mass
Assignee: US Philips Corp
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Filing: 1971-08-27
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Granted: 1973-04-03
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Expires: 1991-08-27
Abstract
Abstract A MASS WAS FOUND WHICH CAN SUPPLY HEAT FOR SOME TIME AFTER IGNITION. THE MASS CONSISTS OF MATERIALS WHICH MUTUALLY REACT CHEMICALLY WHILE DEVELOPING HEAT, SUCH AS LITTHIUM AND A HALOGEN COMPOUND AND ONE ORR MORE FLURIDES WHICH SERVE FOR TEMPORARILY STORING THE DEVELOPED HEAT, FOR EXAMPLE, IN THE FORM OF MELTING HEAT.
Inventors
- 👤 J Schroeder
- 👤 Witteveen R Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:51
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/16; F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/053; F02G1/055; F24; F24V; F24V30/00
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |