Patent US2788941A successfully refreshed from Google Patents.
US2788941A
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Multi-zone control apparatus
Assignee: Honeywell Inc
•
Filing: 1954-11-03
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Granted: 1957-04-16
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Expires: 1974-11-03
Abstract
No abstract record available.
Inventors
- 👤 John B Crysler
- 👤 Gene T Gaddis
- 👤 Erling C Hallanger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:23
CPC Classifications
F; F24; F24F; F24F11/00; F24F11/62; F24F11/63; F24F11/70; F24F11/80; F24F11/83; F24F11/84; F24F11/88; G; G05; G05D; G05D23/00; G05D23/19; G05D23/275; G05D23/27535; G05D23/2754; F24F11/30; F24F2110/00; F24F2110/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2216825A
Cited
US2157817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-15 | 1960-10-15 | 1961-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-15 | 1964-10-15 | 1965-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-15 | 1968-10-15 | 1969-04-16 | $7700.00 | Window Closed / Lapsed |