Patent US3219827A successfully refreshed from Google Patents.
US3219827A
Expired / Lapsed
US
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Infrared source utilizing an exothermic chemical charge
Assignee: Individual
•
Filing: 1963-04-25
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Granted: 1965-11-23
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Expires: 1983-04-25
Abstract
No abstract record available.
Inventors
- 👤 Pittinger Abraham Lincoln
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:14
CPC Classifications
F; F41; F41G; F41G7/00; F41G7/001; F41G7/002; F41G7/004; H; H05; H05B; H05B3/00; H05B3/0033; H05B3/009
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
86 words
A DEVICE FOR THE EMISSION OF RADIANT ENERGY IN THE INFRA-RED SPECTRUM, SAD DEVICE COMPRISNG AMETAL CASING SURROUNDING A CYLINDRICAL REFRACTORY LING, AN EXOTHERMIC CHEMICAL CHARGE SURROUNDED BY SAID CYLINDRICAL REFRACTORY LINING AND HAVING THE ENDS THEREOF CLOSED BY A GRAPHITE CONE AT ONE END AND BY A CHAMBER CONTAINING A GAS PRODUCING MATERIAL AT THE OTHER END, CHARCTERIZED IN THAT THE SAID DEVICE IS HERMETICALLY SEALED AT THE BOUNDARIES OF ITS COMPONENT PARTS, AND THAT SUBSTANTIALLY ALL AIR HAS BEEN EVACUATED FROM THE INTERIOR THEREOF.
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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |