Patent US3090134A successfully refreshed from Google Patents.
US3090134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas locks
Assignee: Liquefreeze Co Inc
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Filing: 1960-06-01
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Granted: 1963-05-21
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Expires: 1980-06-01
Abstract
No abstract record available.
Inventors
- 👤 Willard L Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:53
CPC Classifications
F; F25; F25D; F25D3/00; F25D3/10; F25D3/11; F17; F17C; F17C13/00; F17C13/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A GAS LOCK INCLUDING A CHAMBER OPEN AT BOTH ENDS HAVING A SMOOTH FLOOR ALONG WHICH SOLID OBJECTS MAY TRAVEL INTO, THROUGH AND BE DISCHARGED FROM THE CHAMBER, A ROTATING BRUSH CLOSING EACH END OF THE CHAMBER, THE BRISTLE THEREOF BEING IN CONTACT AT THEIR FREE ENDS WITH SAID FLOOR AND BEING FREE TO YIELD TO PERMIT PASSAGE OF SOLID OBJECTS ALONG THE FLOOR WHILE MAINTAINING SEALING CONTACT THEREWITH.
Claim 2
Dependent Claim
69 words
A GAS LOCK INCLUDING A CHAMBER OPEN AT BOTH ENDS HAVING A SMOOTH FLOOR ALONG WHICH SOLID OBJECTS MAY TRAVEL INTO, THROUGH AND BE DISCHARGED FROM THE CHAMBER, A ROTATING BRUSH CLOSING EACH END OF THE CHAMBER, THE BRISTLE THEREOF BEING IN CONTACT AT THEIR FREE ENDS WITH SAID FLOOR AND BEING FREE TO YIELD TO PERMIT PASSAGE OF SOLID OBJECTS ALONG THE FLOOR WHILE MAINTAINING SEALING CONTACT THEREWITH.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |