Patent US2073109A successfully refreshed from Google Patents.
Patent US2980473A successfully refreshed from Google Patents.
US2980473A
Expired / Lapsed
US
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Surface tension bearing
Assignee: Individual
•
Filing: 1958-10-17
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Granted: 1961-04-18
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Expires: 1978-10-17
Abstract
No abstract record available.
Inventors
- 👤 Marlyn D Tanis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:19
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/06; F16C32/0629; F16C32/0633
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2108641A
Cited
US1544488A
Cited
US1598321A
Cited
US2049343A
Cited
US2631905A
Cited
US2611665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |