US2856484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically operated damper for space heating and cooling systems
Assignee: Stewart Warner Corp
•
Filing: 1955-03-17
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Granted: 1958-10-14
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Expires: 1975-03-17
Abstract
No abstract record available.
Inventors
- 👤 Gordon J Fairbanks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:51
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/275; G05D23/27535; G05D23/2754; F; F24; F24F; F24F11/00; F24F11/70; F24F11/72; F24F11/74; F24F11/76; F24F11/88; F24F11/30; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F2110/00; F24F2110/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US910058A
Cited
US1275766A
Cited
CH164924A
Cited
US2259973A
Cited
US2434070A
Cited
US2406246A
Cited
US2548617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |