US2666046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymer manufacture
Assignee: Standard Oil Development Co
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Filing: 1950-12-22
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Granted: 1954-01-12
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Expires: 1970-12-22
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Nelson
- 👤 Robert F Leary
- 👤 Welch Lester Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:44
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
175 words
PRODUCT CONSISTING ESSENTIALLY OF A MIXTURE OF THREE DIFFERENT FRACTIONS OF HIGH MOLECULAR WEIGHT COPOLYMERS OF A LOWER ALIPHATIC MONOOLEFIN WITH A POLYMERIZABLE MONO-OLEFINIC COMPOUND CONTAINING A CYCLIC NUCLEUS, SAID PRODUCT HAVING AN AVERAGE OF ABOUT 40 TO 70% OF COMBINED CYCLIC CONSTITUENT AND HAVING AN AVERAGE INTRINSIC VISCOSITY ABOVE 0.5, FRACTION A CONSTITUTING ABOUT 30 TO 60% BY WEIGHT OF THE ENTIRE MIXTURE AND HAVING AN AVERAGE OF ABOUT 35 TO 75% OF THE OVER-ALL AVERAGE PER CENT OF COMBINED CYCLIC CONSTITUENT, FRACTION B CONSTITUTING ABOUT 15 TO 55% OF THE ENTIRE MIXTURE AND HAVING AN AVERAGE OF ABOUT 115 TO 135% OF THE OVER-ALL AVERAGE PER CENT OF COMBINED CYCLIC CONSTITUENT, FRACTION C THE BALANCE OF THE COMPOSITION OF ABOUT 5 TO 35% BY WEIGHT, HAVING ABOUT 90 TO 140% OF THE OVER-ALL AVERAGE PER CENT OF COMBINED CYCLIC CONSTITUENT, AND THERE BEING PRESENT IN THE OVERALL COMPOSITION NOT MORE THAN A MINOR AMOUNT OF COPOLYMER MOLECULES HAVING THE SAME AMOUNT OF COMBINED CYCLIC CONSTITUENT AS IN THE AVERAGE OF THE ENTIRE COMPOSITION.
References Cited (Backward Citations)
US2394291A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |