Patent US2791569A successfully refreshed from Google Patents.
US2791569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating compositions containing a heart-cut paraffin wax and a polyolefin
Assignee: Union Oil Company of California
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Filing: 1953-02-24
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Granted: 1957-05-07
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Expires: 1973-02-24
Abstract
No abstract record available.
Inventors
- 👤 Backlund Peter Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:22
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/18; C; C09; C09D; C09D191/00; C09D191/06; C09D191/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A COATING COMPOSITION HAVING A HIGH SEALING STRENGTH AND BEING SUITABLE FOR USE IN COATING FOOD WRAPPING PAPER AND PAPER CONTAINERS, SAID COMPROSITION COMPRISING A HEART-CUT PARAFFIN WAX HAVING A MELTING POINT BETWEEN ABOUT 150*F. AND ABOUT 170*F. AND CONTAINING LESS THAN ABOUT 1% OF OIL AND BETWEEN ABOUT 0.5% AND ABOUT 5% BY WEIGHT, BASED ON THE WAX, OF A POLOLEFIN HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN ABOUT 8,000 AND ABOUT 20,000, SAID HEART-CUT PARAFFIN WAX BEING PREPARED BY TOPPING A WAXY CRUDE OIL TO REMOVE GAS OIL AND LIGHTER FRACTIONS, SEPARATING SLACK WAX FROM THE TOPPED CRUDE OIL, DEOILING AND DISTILLING SAID SEPARATED SLACK WAX AND IN THE DISTILLING OPERATION DISCARDING THE FIRST 40% TO 60% OVERHEAD AND LEAVING BETWEEN 5% AND 30% AS BOTTOMS TO OBTAIN A HEART-CUT.
Claim 2
Dependent Claim
131 words
A COATING COMPOSITION HAVING A HIGH SEALING STRENGTH AND BEING SUITABLE FOR USE IN COATING FOOD WRAPPING PAPER AND PAPER CONTAINERS, SAID COMPROSITION COMPRISING A HEART-CUT PARAFFIN WAX HAVING A MELTING POINT BETWEEN ABOUT 150*F. AND ABOUT 170*F. AND CONTAINING LESS THAN ABOUT 1% OF OIL AND BETWEEN ABOUT 0.5% AND ABOUT 5% BY WEIGHT, BASED ON THE WAX, OF A POLOLEFIN HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN ABOUT 8,000 AND ABOUT 20,000, SAID HEART-CUT PARAFFIN WAX BEING PREPARED BY TOPPING A WAXY CRUDE OIL TO REMOVE GAS OIL AND LIGHTER FRACTIONS, SEPARATING SLACK WAX FROM THE TOPPED CRUDE OIL, DEOILING AND DISTILLING SAID SEPARATED SLACK WAX AND IN THE DISTILLING OPERATION DISCARDING THE FIRST 40% TO 60% OVERHEAD AND LEAVING BETWEEN 5% AND 30% AS BOTTOMS TO OBTAIN A HEART-CUT.
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) | 1960-05-06 | 1960-11-05 | 1961-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-06 | 1964-11-05 | 1965-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-06 | 1968-11-05 | 1969-05-07 | $7700.00 | Window Closed / Lapsed |