Patent US3389972A successfully refreshed from Google Patents.
US3389972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inert gas generator
Assignee: Individual
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Filing: 1964-04-08
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Granted: 1968-06-25
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Expires: 1984-04-08
Abstract
No abstract record available.
Inventors
- 👤 Jr John E Pottharst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:52
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
AN APPARATUS FOR MANUFACTURING SUBSTANTIALLY INERT GAS, UNDER SUPERATMOSPHERC PRESSURE AND AT A DESIRED PREDTERMINED RATE, SAID APPARATUS COMPRISING A HYDROCARBON-FUELED INTERNAL COMBUSION ENGINE WHEREN EXHAUST GAS IS FORMED; A CATALYTIC CONVERTER COMMUNICATING WITH SAID ENGINE FOR ACCEPTING SAID EXHAUSE GAS AND CONVERTING CORROSIVE COMPONENTS THEREOF TO FORM A SUBSTANTIALLY INERT GAS; COOLING SAID SUBSTANTIALLY INERT GAS, SAID COOLING MEANS INCLUDING A FAN DRIVEN BY SAID ENGINE, MEANS FOR VARYING THE PITCH OF THE BLADES OF SAID FAN TO THEREBY CONTROL THE POWER CONSUMED BY THE FAN AND HENCE THE POWER OUTPUT OF SAID ENGINE AND ACCORDINGLY THE RATE OF EXHAUST GAS PRODUCED BY SAID ENGINE WHERE-
Claim 2
Independent Claim
107 words
AN APPARATUS FOR MANUFACTURING SUBSTANTIALLY INERT GAS, UNDER SUPERATMOSPHERC PRESSURE AND AT A DESIRED PREDTERMINED RATE, SAID APPARATUS COMPRISING A HYDROCARBON-FUELED INTERNAL COMBUSION ENGINE WHEREN EXHAUST GAS IS FORMED; A CATALYTIC CONVERTER COMMUNICATING WITH SAID ENGINE FOR ACCEPTING SAID EXHAUSE GAS AND CONVERTING CORROSIVE COMPONENTS THEREOF TO FORM A SUBSTANTIALLY INERT GAS; COOLING SAID SUBSTANTIALLY INERT GAS, SAID COOLING MEANS INCLUDING A FAN DRIVEN BY SAID ENGINE, MEANS FOR VARYING THE PITCH OF THE BLADES OF SAID FAN TO THEREBY CONTROL THE POWER CONSUMED BY THE FAN AND HENCE THE POWER OUTPUT OF SAID ENGINE AND ACCORDINGLY THE RATE OF EXHAUST GAS PRODUCED BY SAID ENGINE WHERE-
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) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |