US2755296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inorganic esters of aliphatic polyoxyalkylene compounds
Assignee: Visco Products Co
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Filing: 1953-02-13
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Granted: 1956-07-17
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Expires: 1973-02-13
Abstract
No abstract record available.
Inventors
- 👤 Willard H Kirkpatrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:37
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
AN INORGANIC ESTER OF AN OXYGEN CONTAINING INORGANIC ACID AND AN ALIPHATIC POLYOXYALKYLENE COMPOUND HAVING A TERMINAL HYDROXY GROUP IN WHICH THE MAJOR PROPORTION OF THE AVERAGE MOLECULAR WEIGHT IS ATTRIBUTABLE TO OXYALKYLENE GROUPS FROM THE GROUP CONSISTING OF OXYPROPYLENE GROUPS AND BOTH OXYETHYLENE AND OXYPROPYLENE GROUPS HAVING A WEIGHT RATIO OF OXYETHYLENE TO OXYPROPYLENE NOT EXCEEDING 4:1 AND THE AVERAGE MOLECULAR WEIGHT ATTRIBUTABLE TO SAID OXYALKYLENE GROUPS IS AT LEAST 1500 WHERE THE OXYALKYLENE GROUPS ARE BOTH OXYETHYLENE AND OXYPROPYLENE AND AT LEAST 1200 WHERE THE OXYALKYLENE GROUPS ARE SOLELY OXYPROPYLENE GROUPS, THE AVERAGE TOTAL MOLECULAR WEIGHT OF SAID ESTER NOT EXCEEDING ABOUT 20,000.
Claim 2
Dependent Claim
105 words
AN INORGANIC ESTER OF AN OXYGEN CONTAINING INORGANIC ACID AND AN ALIPHATIC POLYOXYALKYLENE COMPOUND HAVING A TERMINAL HYDROXY GROUP IN WHICH THE MAJOR PROPORTION OF THE AVERAGE MOLECULAR WEIGHT IS ATTRIBUTABLE TO OXYALKYLENE GROUPS FROM THE GROUP CONSISTING OF OXYPROPYLENE GROUPS AND BOTH OXYETHYLENE AND OXYPROPYLENE GROUPS HAVING A WEIGHT RATIO OF OXYETHYLENE TO OXYPROPYLENE NOT EXCEEDING 4:1 AND THE AVERAGE MOLECULAR WEIGHT ATTRIBUTABLE TO SAID OXYALKYLENE GROUPS IS AT LEAST 1500 WHERE THE OXYALKYLENE GROUPS ARE BOTH OXYETHYLENE AND OXYPROPYLENE AND AT LEAST 1200 WHERE THE OXYALKYLENE GROUPS ARE SOLELY OXYPROPYLENE GROUPS, THE AVERAGE TOTAL MOLECULAR WEIGHT OF SAID ESTER NOT EXCEEDING ABOUT 20,000.
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) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |