US2998195A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple zone furnace control system
Assignee: Midland Ross Corp
•
Filing: 1957-02-11
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Granted: 1961-08-29
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Expires: 1977-02-11
Abstract
No abstract record available.
Inventors
- 👤 Lawrence P Kahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:34
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/22; G05D23/1925; Y; Y10; Y10S; Y10S65/00; Y10S65/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1603729A
Cited
US2202485A
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US2285288A
Cited
US2376573A
Cited
US2394061A
Cited
US2505038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |