Patent US2830541A successfully refreshed from Google Patents.
US2830541A
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US
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Fluid bearing for a tubular rotating shaft
Assignee: Allis Chalmers Corp
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Filing: 1954-06-01
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Granted: 1958-04-15
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Expires: 1974-06-01
Abstract
No abstract record available.
Inventors
- 👤 Richard M Higgins
- 👤 Edward F Brill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:47
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/04; F04D29/046; F04D29/047; F04D13/00; F04D13/02; F04D13/06; F04D13/0606; F04D13/0633; F04D13/064; F04D29/041; F04D29/0413; F04D29/043; F16; F16C; F16C32/00; F16C32/06
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) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |