Patent US2900272A successfully refreshed from Google Patents.
US2900272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heat treating metals employing an oxidation scale inhibitor
Assignee: North American Aviation Corp
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Filing: 1957-10-28
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Granted: 1959-08-18
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Expires: 1977-10-28
Abstract
No abstract record available.
Inventors
- 👤 Edward B Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:27
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
THE PROCESS OF HEAT TREATING METAL ARTICLES COMPRISING APPLYING TO THE SURFACE TO BE HEAT TREATED A COATING COMPOSITION CONSISTING ESSENTIALLY OF (1) AN ORGANIC AMMONIUM CLAY COMPOUND REPRESENTED BY THE GENERAL FORMULA
Claim 2
Dependent Claim
33 words
THE PROCESS OF HEAT TREATING METAL ARTICLES COMPRISING APPLYING TO THE SURFACE TO BE HEAT TREATED A COATING COMPOSITION CONSISTING ESSENTIALLY OF (1) AN ORGANIC AMMONIUM CLAY COMPOUND REPRESENTED BY THE GENERAL FORMULA
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) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |