Patent US3900396A successfully refreshed from Google Patents.
US3301250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flameless heater, heating assembly and heating kit
Assignee: SUN PAK PRODUCTS Inc
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Filing: 1965-03-26
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Granted: 1967-01-31
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Expires: 1985-03-26
Abstract
No abstract record available.
Inventors
- 👤 Ernest C Glasser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:34
CPC Classifications
A; A61; A61F; A61F7/00; A61F7/02; A61F7/03; A61F7/032; A61F7/034; F; F24; F24V; F24V30/00; H; H01; H01M; H01M10/00; H01M10/60; H01M10/61; H01M10/615; H01M10/62; H01M10/625; H01M10/65; H01M10/6595; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10S; Y10S44/00; Y10S44/901; Y10S44/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A FLAMELESS HEATER COMPRISING A POROUS FABRIC BAG PERMEABLE TO THE ATMOSPHERIC GASES INCLUDING OXYGEN, A QUANTITY OF VERMICULITE DISPOSED IN SAID BAG AND COMPLETELY SURROUNDED THEREBY, COMMINUTED IRON PARTICLES DISPOSED IN SAID BAG AND SUBSTANTIALLY UNIFORMLY DISTRIBUTED ABOUT AND UPON SAID VERMICULITE, A QUANTITY OF HIGHLY DISSOCIABLE INORGANIC SALT DISPOSED IN SAID BAG AND SUBSTANTIALLY UNIFORMLY DISTRIBUTED ABOUT AND UPON SAID VERMICULITE AND SAID IRON PARTICLES, AND AN AQUEOUS SOLUTION CONTAINING A WETTING AGENT DISPOSED IN SAID BAG AND SUBSTANTIALLY UNIFORMLY DISTRIBUTED ABOUT AND UPON SAID VERMICULITE AND SAID IRON PARTICLES AND SAID INORGANIC SALT, WHEREBY UPON EXPOSURE TO THE ATMOSPHERE OF SAID BAG AND THE CONTENTS THEREOF THE ATMOSPHERIC OXYGEN PASSING THROUGH SAID BAG REACTS WITH SAID IRON PARTICLES IN THE PRESENCE OF SAID INORGANIC SALT AND SAID AQUEOUS SOLUTION TO PRODUCE HEAT.
Claim 2
Dependent Claim
135 words
A FLAMELESS HEATER COMPRISING A POROUS FABRIC BAG PERMEABLE TO THE ATMOSPHERIC GASES INCLUDING OXYGEN, A QUANTITY OF VERMICULITE DISPOSED IN SAID BAG AND COMPLETELY SURROUNDED THEREBY, COMMINUTED IRON PARTICLES DISPOSED IN SAID BAG AND SUBSTANTIALLY UNIFORMLY DISTRIBUTED ABOUT AND UPON SAID VERMICULITE, A QUANTITY OF HIGHLY DISSOCIABLE INORGANIC SALT DISPOSED IN SAID BAG AND SUBSTANTIALLY UNIFORMLY DISTRIBUTED ABOUT AND UPON SAID VERMICULITE AND SAID IRON PARTICLES, AND AN AQUEOUS SOLUTION CONTAINING A WETTING AGENT DISPOSED IN SAID BAG AND SUBSTANTIALLY UNIFORMLY DISTRIBUTED ABOUT AND UPON SAID VERMICULITE AND SAID IRON PARTICLES AND SAID INORGANIC SALT, WHEREBY UPON EXPOSURE TO THE ATMOSPHERE OF SAID BAG AND THE CONTENTS THEREOF THE ATMOSPHERIC OXYGEN PASSING THROUGH SAID BAG REACTS WITH SAID IRON PARTICLES IN THE PRESENCE OF SAID INORGANIC SALT AND SAID AQUEOUS SOLUTION TO PRODUCE HEAT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |