US2973997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft bearing and seal
Assignee: American Oil Co
•
Filing: 1957-09-20
•
Granted: 1961-03-07
•
Expires: 1977-09-20
Abstract
No abstract record available.
Inventors
- 👤 Earl V Kirkland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:12
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/18; F16J15/20; F16C; F16C33/00; F16C33/72; F16C33/74; Y; Y10; Y10S; Y10S285/00; Y10S285/911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |