US2663789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-treatment apparatus
Assignee: Westinghouse Electric Corp
•
Filing: 1950-08-12
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Granted: 1953-12-22
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Expires: 1970-08-12
Abstract
No abstract record available.
Inventors
- 👤 John A Redmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:36
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1993022A
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US2167798A
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US2271916A
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US2353130A
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US2453529A
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US2444259A
Cited
GB591150A
Cited
US2511662A
Cited
US2471471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |