US3616624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminar flow work bench
Assignee: ENVIRONMENTAL AIR CONTROL COMPANY Inc A CORP OF
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Filing: 1969-11-04
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Granted: 1971-11-02
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Expires: 1989-11-04
Abstract
Abstract A DUST FREE WORK BENCH IS PROVIDED COMPRISING A CABINET CONTAINING A BLOWER AND PREFILTER AND HAVING AN OPENING TO RECEIVE A WORK AREA ENCLOSURE AND A REMOVABLE WORK AREA ENCLOSURE INCLUDING A HIGH EFFICIENCY PARTICULATE AIR FILTER. THE HEPA FILTER IS PRESEALED TO THE WORK AREA SO THAT LEAKAGE CAN BE TOLERATED BETWEEN THE CABINET AND ENCLOSURE WITHOUT RESULTING IN CONTIMINATION OF THE AIR FLOW WITHIN THE ENCLOSURE.
Inventors
- 👤 Robert Claude Marsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:44
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/16; F24F3/163; B; B25; B25H; B25H1/00; B25H1/20; Y; Y10; Y10S; Y10S55/00; Y10S55/18
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 |