Patent US2930762A successfully refreshed from Google Patents.
US2930762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl compounds as lubricants in pilling operations
Assignee: Universal Oil Products Co
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Filing: 1957-08-08
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Granted: 1960-03-29
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Expires: 1977-08-08
Abstract
No abstract record available.
Inventors
- 👤 Richard J Schoenenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:48
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
IN THE PROCESS OF FORMING PELLETS FROM A FINELY DIVIDED REFRACTORY INORGANIC OXIDE POWDER, WHEREIN A LUBRICANT IS EMPLOYED TO FACILITATE THE PELLETABILITY OF SAID POWDER, THE IMPROVEMENT WHICH COMPRISES INTERMIXING SAID POWDER WITH FROM ABOUT 0.5% TO ABOUT 6% BY WEIGHT OF A POLYVINYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ALCOHOL, POLYVINYL ACETAL AND POLYVINYL ESTERS AND COMPRESSING THE RESULTANT MIXTURE INTO PELLETS.
Claim 2
Dependent Claim
66 words
IN THE PROCESS OF FORMING PELLETS FROM A FINELY DIVIDED REFRACTORY INORGANIC OXIDE POWDER, WHEREIN A LUBRICANT IS EMPLOYED TO FACILITATE THE PELLETABILITY OF SAID POWDER, THE IMPROVEMENT WHICH COMPRISES INTERMIXING SAID POWDER WITH FROM ABOUT 0.5% TO ABOUT 6% BY WEIGHT OF A POLYVINYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ALCOHOL, POLYVINYL ACETAL AND POLYVINYL ESTERS AND COMPRESSING THE RESULTANT MIXTURE INTO PELLETS.
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) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |