US2925429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical compositions
Assignee: Visco Products Co
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Filing: 1954-07-12
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Granted: 1960-02-16
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Expires: 1974-07-12
Abstract
No abstract record available.
Inventors
- 👤 Willard H Kirkpatrick
- 👤 Walker Alice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:12
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
THE PRODUCT OF THE REACTION OF 150-300*C. OF CASTOR OIL, AN ORGANIC DICARBOXY ACID AND A POLYOXYALKYLENE COMPOUND HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN ABOUT 1700 AND 7500 FROM THE GROUP CONSISTING OF GLYCOLS AND MONOETHERS OF GLYCOLS IN WHICH THE OXYALKYLENE GROUPS CONSIST ESSENTIALLY OF OXYETHYLENE AND OXYPROPYLENE GROUPS AND THE WEIGHT RATIO OF OXYETHYLENE TO OXYPROPYLENE IS AT LEAST 1:4 AND NOT GREATER THAN 4:1, THE MOLAR RATIO OF DICARBOXY ACID TO CASTOR OIL BEING AT LEAST 1:3 AND THE MOLAR RATIO OF THE POLYOXYALKLENE COMPOUND TO CASTOR OIL BEING AT LEAST 1:3.
Claim 2
Dependent Claim
95 words
THE PRODUCT OF THE REACTION OF 150-300*C. OF CASTOR OIL, AN ORGANIC DICARBOXY ACID AND A POLYOXYALKYLENE COMPOUND HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN ABOUT 1700 AND 7500 FROM THE GROUP CONSISTING OF GLYCOLS AND MONOETHERS OF GLYCOLS IN WHICH THE OXYALKYLENE GROUPS CONSIST ESSENTIALLY OF OXYETHYLENE AND OXYPROPYLENE GROUPS AND THE WEIGHT RATIO OF OXYETHYLENE TO OXYPROPYLENE IS AT LEAST 1:4 AND NOT GREATER THAN 4:1, THE MOLAR RATIO OF DICARBOXY ACID TO CASTOR OIL BEING AT LEAST 1:3 AND THE MOLAR RATIO OF THE POLYOXYALKLENE COMPOUND TO CASTOR OIL BEING AT LEAST 1:3.
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) | 1963-02-15 | 1963-08-17 | 1964-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-15 | 1967-08-17 | 1968-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-15 | 1971-08-17 | 1972-02-16 | $7700.00 | Window Closed / Lapsed |