US3311732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction heating means
Assignee: North American Aviation Corp
•
Filing: 1964-04-20
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Granted: 1967-03-28
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Expires: 1984-04-20
Abstract
No abstract record available.
Inventors
- 👤 Jolm A Stein
- 👤 Therian E Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:51
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
INDUCTION HEATING MEANS FOR CAUSING HEAT IN A LOCALIZED AREA OF A SPECIMEN, SAID MEANS INCLUDING A GENERALLY CYLINDRICAL INDUCTION COIL FOR CONCENTRICALLY SURROUNDING SAID SPECIMEN AND COMPRISING HOLLOW CONDUCTIVE TUBING THROUGH WHICH COOLING AIR, ADMITTED INTO A PLURALITY OF LOCATIONS INTERMEDIATE THE ENDS OF SAID TUBING, PASSES DURING THE APPLICATION OF SAID HEAT, THE WALLS OF SAID TUBING CONSTITUTING A PORTION OF AN ELECTRICAL CIRCUIT THROUGH WHICH ELECTRICAL POWER SUPPLIED TO SAID COIL RESULTS IN SAID HEAT, AND EXIT MEANS COMPRISING AT LEAST ONE APERTURE IN SAID TUBING INTERMEDIATE THE ENDS THEREOF FOR VENTING SAID COOLING AIR TO SURROUNDING ATMOSPHERE.
Claim 2
Dependent Claim
101 words
INDUCTION HEATING MEANS FOR CAUSING HEAT IN A LOCALIZED AREA OF A SPECIMEN, SAID MEANS INCLUDING A GENERALLY CYLINDRICAL INDUCTION COIL FOR CONCENTRICALLY SURROUNDING SAID SPECIMEN AND COMPRISING HOLLOW CONDUCTIVE TUBING THROUGH WHICH COOLING AIR, ADMITTED INTO A PLURALITY OF LOCATIONS INTERMEDIATE THE ENDS OF SAID TUBING, PASSES DURING THE APPLICATION OF SAID HEAT, THE WALLS OF SAID TUBING CONSTITUTING A PORTION OF AN ELECTRICAL CIRCUIT THROUGH WHICH ELECTRICAL POWER SUPPLIED TO SAID COIL RESULTS IN SAID HEAT, AND EXIT MEANS COMPRISING AT LEAST ONE APERTURE IN SAID TUBING INTERMEDIATE THE ENDS THEREOF FOR VENTING SAID COOLING AIR TO SURROUNDING ATMOSPHERE.
References Cited (Backward Citations)
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Cited
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Cited
US3076884A
Cited
US3110793A
Cited
US3182170A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |