US3292937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft seal for liquid centrifuges
Assignee: Individual
•
Filing: 1964-04-03
•
Granted: 1966-12-20
•
Expires: 1984-04-03
Abstract
No abstract record available.
Inventors
- 👤 Clifford E Nunley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:08
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/04; B04B5/0442; B04B11/00; B04B11/02; Y; Y10; Y10S; Y10S277/00; Y10S277/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A SHAFT SEAL FOR A LIQUID CENTRIFUGE COMPRISING A HOUSING DEFINING AN OPEN-ENDED CHAMBER, CHANNELS FOR LEADING FLUID INTO AND REMOVING IT FROM THE CHAMBER, A HEAD ROTATABLY DISPOSED IN THE CHAMBER IN SPACED RELATION TO THE WALLS AND HAVING DUCTS FOR COMMUNICATION WITH THE CHANNELS IN THE HEAD, A SEALING ELEMENT DISPOSED BETWEEN THE HEAD AND THE HOUSING FOR BRIDGING THE CHANNELS AND DUCTS INTO COMMUNICATION, A SHAFT INCLUDING CONCENTRICALLY POSITIONED TUBES JOINED TO THE HEAD AND EXTENDING INTO
Claim 2
Dependent Claim
80 words
A SHAFT SEAL FOR A LIQUID CENTRIFUGE COMPRISING A HOUSING DEFINING AN OPEN-ENDED CHAMBER, CHANNELS FOR LEADING FLUID INTO AND REMOVING IT FROM THE CHAMBER, A HEAD ROTATABLY DISPOSED IN THE CHAMBER IN SPACED RELATION TO THE WALLS AND HAVING DUCTS FOR COMMUNICATION WITH THE CHANNELS IN THE HEAD, A SEALING ELEMENT DISPOSED BETWEEN THE HEAD AND THE HOUSING FOR BRIDGING THE CHANNELS AND DUCTS INTO COMMUNICATION, A SHAFT INCLUDING CONCENTRICALLY POSITIONED TUBES JOINED TO THE HEAD AND EXTENDING INTO
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |