Patent US2551387A successfully refreshed from Google Patents.
US2551387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of unsaturated fatty acids
Assignee: —
•
Filing: —
•
Granted: 1951-05-01
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Expires: 1968-05-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:45
CPC Classifications
C; C08; C08L; C08L47/00; C09; C09D; C09D145/00; C08K; C08K5/00; C08K5/01; C08L45/00; C08L9/00; C08L91/00; C09D191/00; C08L2666/00; C08L2666/02; C08L2666/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A METHOD OF OBTAINING COPOLYMERS OF A MIXTURE OF 30 TO 95* OF DRYING OILS AND 5 TO 70% OF CYCLIC DIENE HYDROCARBONS OF A CLASS CONSISTING OF CYCLOPENTADIENE AND LOWER POLYMERS THEREOF WHICH PROCESS COMPRISES POLYMERIZING THE OIL AND THE HYDROCARBON UNDER HEAT AND PRESSURE IN THE PRESENCE OF 1 TO 10%, AN ESTER OF POLYETHYLENE GLYCOL AND AN UNSATURATED FATTY ACID OF A NATURAL GLYCERIDE OIL.
Claim 2
Independent Claim
68 words
A METHOD OF OBTAINING COPOLYMERS OF A MIXTURE OF 30 TO 95* OF DRYING OILS AND 5 TO 70% OF CYCLIC DIENE HYDROCARBONS OF A CLASS CONSISTING OF CYCLOPENTADIENE AND LOWER POLYMERS THEREOF WHICH PROCESS COMPRISES POLYMERIZING THE OIL AND THE HYDROCARBON UNDER HEAT AND PRESSURE IN THE PRESENCE OF 1 TO 10%, AN ESTER OF POLYETHYLENE GLYCOL AND AN UNSATURATED FATTY ACID OF A NATURAL GLYCERIDE OIL.
References Cited (Backward Citations)
US2392732A
Cited
US2387895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |