US2773040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-producing compositions
Assignee: Drackett Co
•
Filing: 1953-05-19
•
Granted: 1956-12-04
•
Expires: 1973-05-19
Abstract
No abstract record available.
Inventors
- 👤 Walton George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:39
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A COMPOSITION LIBERATING HEAT WHEN ADDED TO WATER, COMPRISING, IN ADMIXTURE IN SUBSTANTIALLY DRY AND DIVIDED FORM, AND AS DISCRETE PARTICLES, FROM ABOUT 2% TO ABOUT 8% ALUMINUM BY WEIGHT OF THE COMPOSITION, AND AN ALKALI METAL HYDRODIDE IN AN AMOUNT AT LEAST TWICE THE THEROETICAL AMOUNT REQUIRED FOR COMBINATION WITH THE ALUMINUM, THE ALUMINUM BEING IN THE FORM OF PARTICLES OF SUBSTANTIALLY UNIFORM SIZE AVERAGING FROM ABOUT 150 TO ABOUT 350 PARTICLES PER GRAM.
Claim 2
Dependent Claim
75 words
A COMPOSITION LIBERATING HEAT WHEN ADDED TO WATER, COMPRISING, IN ADMIXTURE IN SUBSTANTIALLY DRY AND DIVIDED FORM, AND AS DISCRETE PARTICLES, FROM ABOUT 2% TO ABOUT 8% ALUMINUM BY WEIGHT OF THE COMPOSITION, AND AN ALKALI METAL HYDRODIDE IN AN AMOUNT AT LEAST TWICE THE THEROETICAL AMOUNT REQUIRED FOR COMBINATION WITH THE ALUMINUM, THE ALUMINUM BEING IN THE FORM OF PARTICLES OF SUBSTANTIALLY UNIFORM SIZE AVERAGING FROM ABOUT 150 TO ABOUT 350 PARTICLES PER GRAM.
References Cited (Backward Citations)
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Cited
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Cited
US1814741A
Cited
US1938560A
Cited
US2010800A
Cited
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Cited
US2676153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |