US3074828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exothermic heated metal for heat treating and forming
Assignee: McDonnell Aircraft Corp
•
Filing: 1960-02-01
•
Granted: 1963-01-22
•
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 02:25
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.
References Cited (Backward Citations)
US934711A
Cited
US1077827A
Cited
US1849056A
Cited
US1799945A
Cited
US1815691A
Cited
GB463511A
Cited
US2138023A
Cited
GB568453A
Cited
US2337314A
Cited
US2464210A
Cited
US2500097A
Cited
US2680063A
Cited
US2791816A
Cited
US2889238A
Cited
US2816012A
Cited
US2898253A
Cited
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 |