US2847203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treating apparatus
Assignee: Individual
•
Filing: 1956-04-30
•
Granted: 1958-08-12
•
Expires: 1976-04-30
Abstract
No abstract record available.
Inventors
- 👤 Vernon H Ferguson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:28
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/62; C21D1/63
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1697129A
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US1668164A
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US1859803A
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US1949438A
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US2074185A
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US2223603A
Cited
US2254913A
Cited
US2438064A
Cited
US2682332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |