Patent US3074828A successfully refreshed from Google Patents.
US3074828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exothermic heated metal for heat treating and forming
Assignee: McDonnell Aircraft Corp
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Filing: 1960-02-01
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Granted: 1963-01-22
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Expires: 1980-02-01
Abstract
No abstract record available.
Inventors
- 👤 Harry M Griffin
- 👤 August R Savu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:16
CPC Classifications
C; C22; C22F; C22F1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A METHOD OF HEATING TREATING METAL OBJECTS COMPRISING THE STEPS OF POSITIONING A METAL OBJECT COATED WITH AN IN FLAMMABLE COMPOSITION IN A TREATMENT TANK, BURNING OFF THE COMPOSITION LEAVING THE METAL OBJECT AT A DESIRED TEMPERATURE LEVEL FOR HEAT TREATING, AND QUENCHING THE METAL IN THE SAME TANK IN WHICH IT IS HEATED.
Claim 2
Independent Claim
54 words
A METHOD OF HEATING TREATING METAL OBJECTS COMPRISING THE STEPS OF POSITIONING A METAL OBJECT COATED WITH AN IN FLAMMABLE COMPOSITION IN A TREATMENT TANK, BURNING OFF THE COMPOSITION LEAVING THE METAL OBJECT AT A DESIRED TEMPERATURE LEVEL FOR HEAT TREATING, AND QUENCHING THE METAL IN THE SAME TANK IN WHICH IT IS HEATED.
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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) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |