Patent US2953443A successfully refreshed from Google Patents.
US2953443A
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Chemical heating composition, heating unit containing the same and method of manufacture
Assignee: ALLOYD ENGINEERING LAB Inc
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Filing: 1957-02-11
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Granted: 1960-09-20
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Expires: 1977-02-11
Abstract
No abstract record available.
Inventors
- 👤 Roger A Lloyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:20
CPC Classifications
C; C22; C22B; C22B5/00; C22B5/02; C22B5/06; A; A47; A47J; A47J36/00; A47J36/24; A47J36/30; C22B5/04; F; F24; F24V; F24V30/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A METHOD OF PREPARING AN AUTOGENOUS COMBUSTIBLE ALUMINUM-IRON OXIDE COMPOSITION WHICH COMPRISES MIXING POWDERED ALUMINUM AND SOLID PARTICLES OF IRON OXIDE TO FORM A HOMOGENEOUS MIXTURE THEREOF, COMPRESSING SAID MIXTURE WHILE HOT, SAID MIXTURE BEING HEATED TO A TEMPERATURE IN THE RANGE OF FROM 375*F. AND 2000*F., AND SAID HEATED MIXTURE BEING COMPRESSED AT A PRESSURE IN THE RANGE OF 40,000 TO 10,000 POUNDS PER SQUARE INCH TO FORM AN AUTOGENOUS COMBUSTIBLE MIXTURE HAVING A DENSITY OF AT LEAST 2.7 GRAMS PER CUBIC CENTIMETER, A COMPRESSIVE STRENGTH OF AT LEAST 2000 POUNDS PER SQUARE INCH AND A VOID VOLUME OF LESS THAN 35 PERCENT BASED ON THE TOTAL VOLUME.
Claim 2
Dependent Claim
143 words
A HERMETICALLY SEALED HEATING UNIT COMPRISING A METALLIC CONTAINER COMPLETELY FULL OF AN AUTOGENOUS COMBUSTIBLE COMPOSITION COMPRISING A HOMOGENOUS MIXTURE OF A POWDERED METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, LITHIUM, MAGNESIUM, ZINC, NICKEL, ANTIMONY, ZIRCONIUM, IRON, AND CALCIUM SILICIDE AND SOLID PARTICLES OF AN OXIDIZING AGENT SELECTED FROM THE GROUP CONSISTING OF POTASSIUM PERMANGANATE, ALKALI METAL AND ALKALINE EARTH METAL CHLORATES AND PERCHLORATES, BARIUM OXIDE, IRON OXIDE, COPPER OXIDE, LITHARGE, MANGANESE DIOXIDE, SODIUM AND BARIUM CHROMATES AND FERROUS SULFIDE, SAID MIXTURE HAVING BEEN COMPRESSED AT A PRESSURE OF 5,000 TO 40,000 POUNDS PER SQUARE INCH AT A TEMPERATURE OF FROM 2000*F. TO ABOUT 400*F. AND HAVING A DENSITY OF AT LEAST 2.7 GRAMS PER CUBIC CENTIMETER, A COMPRESSIVE STRENGTH OF AT LEAST 2000 POUNDS PER SQUARE INCH AND A VOID VOLUME OF LESS THAN 35 PERCENT BASED ON THE TOTAL VOLUME.
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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) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |