US3398252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treatment apparatus
Assignee: Westinghouse Electric Corp
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Filing: 1965-11-15
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Granted: 1968-08-20
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Expires: 1985-11-15
Abstract
No abstract record available.
Inventors
- 👤 Ashley P Bock
- 👤 Frank E Henry
- 👤 John A Redmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:56
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/56; C21D11/00; C21D9/60; H; H05; H05B; H05B6/00; H05B6/02; H05B6/04; H05B6/06; H05B6/10; H05B6/101; H05B6/103; H05B6/104; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 0
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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) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |