US2860833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-room heating and ventilating system
Assignee: JOHN J NESBITT Inc
•
Filing: 1955-04-21
•
Granted: 1958-11-18
•
Expires: 1975-04-21
Abstract
No abstract record available.
Inventors
- 👤 John W Mcelgin
- 👤 Jr Samuel W Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:23
CPC Classifications
F; F24; F24D; F24D5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US528928A
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US2264122A
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US761581A
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US860700A
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FR403241A
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US1606108A
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US1886292A
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US1922220A
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US1969315A
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US2246802A
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US2376412A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-17 | 1962-05-19 | 1962-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-17 | 1966-05-19 | 1966-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-17 | 1970-05-19 | 1970-11-18 | $7700.00 | Window Closed / Lapsed |