Patent US4447684A successfully refreshed from Google Patents.
Patent US2539975A successfully refreshed from Google Patents.
US2539975A
Expired / Lapsed
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Process for improving the drying qualities of tall oil
Assignee: Sherwin Williams Co
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Filing: 1948-10-14
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Granted: 1951-01-30
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Expires: 1968-10-14
Abstract
No abstract record available.
Inventors
- 👤 William C Spitzer
- 👤 Russell T Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:31
CPC Classifications
C; C09; C09F; C09F1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS FOR THE MANUFACTURE OF A VARNISH VEHICLE WHICH COMPRISES HEATING AN OIL-LIKE UNSATURATE SELECTED FROM THE GROUP CONSISTING OF CRUDE TALL OIL ACIDS AND THE POLYHYDRIC ALCOHOL ESTERS THEREOF, TO A TEMPERATURE WITHIN THE RANGE OF FROM 200 DEGREES C. TO 300 DEGREE C., VIGOROUSLY BLOWING AN OXYGEN LIBERATING GAS THERETHROUGH AND MAINTAINING SAID REACTION CONDITIONS THEREAFTER FOR FROM 2 TO 8 HOURS.
Claim 2
Dependent Claim
65 words
A PROCESS FOR THE MANUFACTURE OF A VARNISH VEHICLE WHICH COMPRISES HEATING AN OIL-LIKE UNSATURATE SELECTED FROM THE GROUP CONSISTING OF CRUDE TALL OIL ACIDS AND THE POLYHYDRIC ALCOHOL ESTERS THEREOF, TO A TEMPERATURE WITHIN THE RANGE OF FROM 200 DEGREES C. TO 300 DEGREE C., VIGOROUSLY BLOWING AN OXYGEN LIBERATING GAS THERETHROUGH AND MAINTAINING SAID REACTION CONDITIONS THEREAFTER FOR FROM 2 TO 8 HOURS.
References Cited (Backward Citations)
US1938532A
Cited
US2332849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |