Patent US1414366A successfully refreshed from Google Patents.
US1414366A
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Method of and apparatus for heat treating metallic articles
Assignee: Snead & Co
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Filing: 1920-07-15
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Granted: 1922-05-02
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Expires: 1940-07-15
Abstract
No abstract record available.
Inventors
- 👤 Harry P Macdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:45
CPC Classifications
C; C21; C21D; C21D11/00; H; H05; H05B; H05B3/00; H05B3/0004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1925-05-01 | 1925-10-31 | 1926-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-05-01 | 1929-10-31 | 1930-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-05-01 | 1933-10-31 | 1934-05-02 | $7700.00 | Window Closed / Lapsed |