US3383633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic quick-opening waveguide closure
Assignee: United States Department of the Navy
•
Filing: 1966-05-25
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Granted: 1968-05-14
•
Expires: 1986-05-25
Abstract
No abstract record available.
Inventors
- 👤 Alexander M Havlicsek
- 👤 Roger F Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 22:56
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/04; H01P1/042; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87917; Y10T137/87925; Y10T137/87941; Y10T137/87949; Y10T137/87957
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
AN AUTOMATIC-OPERATING CLOSURE DEVICE USEFUL TO CLOSE SMALL PASSAGES TO AIRBORNE CONTAMINANTS WHEN SUCH PASSAGES ARE OPENED AT A BREAK IN A HOSTILE ENVIRONMENT COMPRISING: TWO PAIRS OF COVERS, EACH PAIR BEING POSITIONED TO COVER A RESPECTIVE FACE IN THE BREAK IN THE PASSAGES TO BE COVERED, AND
Claim 2
Dependent Claim
48 words
AN AUTOMATIC-OPERATING CLOSURE DEVICE USEFUL TO CLOSE SMALL PASSAGES TO AIRBORNE CONTAMINANTS WHEN SUCH PASSAGES ARE OPENED AT A BREAK IN A HOSTILE ENVIRONMENT COMPRISING: TWO PAIRS OF COVERS, EACH PAIR BEING POSITIONED TO COVER A RESPECTIVE FACE IN THE BREAK IN THE PASSAGES TO BE COVERED, AND
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) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |