US3023512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-friction mountings
Assignee: Sperry Sun Well Surveying Co
•
Filing: 1955-12-05
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Granted: 1962-03-06
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Expires: 1975-12-05
Abstract
No abstract record available.
Inventors
- 👤 Marion H Morris
- 👤 Samuel H Williston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:05
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/02; G; G01; G01C; G01C17/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
64 words
AN ANTIFRICTION MOUNTING COMPRISING A CONTAINER PRESENTING A SPHERICAL SURFACE NON-WETTABLE BY MERCURY, A POOL OF MERCURY IN SAID CONTAINER, AND A FLOAT ASSEMBLY FLOATING ON SAID POOL OF MERCURY WITH ITS CENTER OF GRAVITY ABOVE ITS CENTER OF BUOYANCY, SAID FLOAT ASSEMBLY PRESENTING TO THE SURFACE OF THE MERCURY A SOLID SURFACE IN THE FORM OF A RING HAVING WETTABLE AND NON-WETTABLE AREAS,
References Cited (Backward Citations)
US1294710A
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US1912358A
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US2246519A
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US2644242A
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US2616187A
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US2927765A
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US2830381A
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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) | 1965-03-05 | 1965-09-04 | 1966-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-05 | 1969-09-04 | 1970-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-05 | 1973-09-04 | 1974-03-06 | $7700.00 | Window Closed / Lapsed |