US3279680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
De-air device
Assignee: Marvel Engineering Co
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Filing: 1964-07-20
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Granted: 1966-10-18
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Expires: 1984-07-20
Abstract
No abstract record available.
Inventors
- 👤 Walter J Kudlaty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:43
CPC Classifications
B; B01; B01D; B01D36/00; B01D36/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A DE-AIR DEVICE INCLUDING A BODY, A FIRST PASSAGBE THROUGH SAID BODY, A SECOND PASSAGE LATERALLY THROUGH SAID BODY, AND COMMUNICATING WITH OPPOSITE SIDES OF SAID FIRST PASSAGE, A SHAFT MOVABLY POSITIONED IN SAID FIRST PASSGE, A REDUCED AREA ON SAID SHAFT SELECTIVELY ALIGNABLE WITH SAID LATERAL PASSAGE AND YIELDINGLY URGED OUT OF SAID ALIGNMENT, A VENTURI NOZZLE STRUCTURE COMMUNICATING WITH SAID LATERL PASSAGE ON ONE SIDE OF SAID SHAFT, AND MEANS CARIED BY SAID SHAFT AND POSITIONED TO OPEN AND CLOSE COMMUNICATION OF SAID NOZZLE STRUCTURE WITH A CHAMBER TO BE EVACUATED.
Claim 2
Dependent Claim
93 words
A DE-AIR DEVICE INCLUDING A BODY, A FIRST PASSAGBE THROUGH SAID BODY, A SECOND PASSAGE LATERALLY THROUGH SAID BODY, AND COMMUNICATING WITH OPPOSITE SIDES OF SAID FIRST PASSAGE, A SHAFT MOVABLY POSITIONED IN SAID FIRST PASSGE, A REDUCED AREA ON SAID SHAFT SELECTIVELY ALIGNABLE WITH SAID LATERAL PASSAGE AND YIELDINGLY URGED OUT OF SAID ALIGNMENT, A VENTURI NOZZLE STRUCTURE COMMUNICATING WITH SAID LATERL PASSAGE ON ONE SIDE OF SAID SHAFT, AND MEANS CARIED BY SAID SHAFT AND POSITIONED TO OPEN AND CLOSE COMMUNICATION OF SAID NOZZLE STRUCTURE WITH A CHAMBER TO BE EVACUATED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |