US2998966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-treating apparatus
Assignee: Midland Ross Corp
•
Filing: 1957-01-02
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Granted: 1961-09-05
•
Expires: 1977-01-02
Abstract
No abstract record available.
Inventors
- 👤 Philip L Knight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:52
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/74; C21D9/00; C21D9/52; C21D9/54; C21D9/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US967876A
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US1694684A
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FR767338A
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US2629162A
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US2664282A
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US2666994A
Cited
US2656449A
Cited
US2805054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-04 | 1965-03-06 | 1965-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-04 | 1969-03-06 | 1969-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-04 | 1973-03-06 | 1973-09-05 | $7700.00 | Window Closed / Lapsed |