US3616745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic damper control
Assignee: Individual
•
Filing: 1969-10-01
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Granted: 1971-11-02
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Expires: 1989-10-01
Abstract
Abstract IN ABSTRACT, A PREFERED EMBODIMENT OF THIS INVENTION IS AN AUTOMATIC DAMPER CONTROL TO OPEN SUCTION LINES THAT REMOVE CHIPS, DUST AND OTHER DEBRIS DURING OPERATION OF WOOD WORKING TYPE MACHINES AND TO CLOSE THE SUCTION LINES WHEN THE MACHINE IS SHUT DOWN.
Inventors
- 👤 James C Russell Sr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:26
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/04; F24F7/06; F24F7/065; B; B08; B08B; B08B15/00; B08B15/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |