US2630272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damper regulator
Assignee: A P CONTROLS Corp
•
Filing: 1949-09-16
•
Granted: 1953-03-03
•
Expires: 1969-09-16
Abstract
No abstract record available.
Inventors
- 👤 Edward R Rack
- 👤 Robert J Duncan
- 👤 John T Dulak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:47
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/275; G05D23/1919
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1926680A
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US1968355A
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US2020618A
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US2227258A
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US2291783A
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US2210144A
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US2269411A
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US2308731A
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US2291210A
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US2353350A
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US2412218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-02 | 1956-09-01 | 1957-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-02 | 1960-09-01 | 1961-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-02 | 1964-09-01 | 1965-03-03 | $7700.00 | Window Closed / Lapsed |