Patent US2797767A successfully refreshed from Google Patents.
US2797767A
Expired / Lapsed
US
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Method and apparatus for treating lubricants
Assignee: Individual
•
Filing: 1956-07-31
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Granted: 1957-07-02
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Expires: 1976-07-31
Abstract
No abstract record available.
Inventors
- 👤 Brooke Lewis
- 👤 John P Piazza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:08
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/0021; C; C10; C10M; C10M5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
METHOD WHICH COMPRISES FORCING AN AIR-CONTAINING FLUID LUBRICANT THROUGH ELONGATED AND TAPERED SLOTS NARROWING TO WIDTHS OF THE ORDER OF 0.006 TO 0.02 INCH INTO A ZONE OF SUB-ATMOSPHERIC PRESSURE
Claim 2
Dependent Claim
30 words
METHOD WHICH COMPRISES FORCING AN AIR-CONTAINING FLUID LUBRICANT THROUGH ELONGATED AND TAPERED SLOTS NARROWING TO WIDTHS OF THE ORDER OF 0.006 TO 0.02 INCH INTO A ZONE OF SUB-ATMOSPHERIC PRESSURE
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) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |