Patent US2671700A successfully refreshed from Google Patents.
US2671700A
Expired / Lapsed
US
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Air bearing apparatus
Assignee: Individual
•
Filing: 1949-06-03
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Granted: 1954-03-09
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Expires: 1969-06-03
Abstract
No abstract record available.
Inventors
- 👤 Marion B Seyffert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:57
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/06; F16C32/0681; F16C32/0696
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US594462A
Cited
US930851A
Cited
US1906715A
Cited
GB400159A
Cited
US2160778A
Cited
US2449297A
Cited
US2442202A
Cited
GB626268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |