US3412976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum held hydrostatic rotor
Assignee: Professional Instruments Co
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Filing: 1967-02-08
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Granted: 1968-11-26
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Expires: 1987-02-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Theodore J Arneson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:31
CPC Classifications
B; B24; B24B; B24B47/00; B24B47/10; B24B47/14; B23; B23Q; B23Q5/00; B23Q5/02; B23Q5/04; B23Q5/06; Y; Y10; Y10S; Y10S415/00; Y10S415/904
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) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |