Patent US2865954A successfully refreshed from Google Patents.
US2865954A
Expired / Lapsed
US
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Mixed esters of pentaerythritol
Assignee: Hercules Powder Co
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Filing: 1957-08-05
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Granted: 1958-12-23
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Expires: 1977-08-05
Abstract
No abstract record available.
Inventors
- 👤 Henry C Dehm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:12
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101; C08K5/103
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A MIXED ESTER OF PENTAERYTHRITOL IN WHICH AN AVERAGE OF FROM 0.5 TO 2.5 HYDROXYL GROUPS ARE ESTERIFIED WITH AN ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID, AND AN AVERAGE OF FROM 1.5 TO 3.5 HYDROXYL GROUPS ARE ESTERIFIED WITH AN ALKANOIC ACID HAVING FROM 4 TO 8 CARBON ATOMS.
Claim 2
Dependent Claim
55 words
A MIXED ESTER OF PENTAERYTHRITOL IN WHICH AN AVERAGE OF FROM 0.5 TO 2.5 HYDROXYL GROUPS ARE ESTERIFIED WITH AN ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID, AND AN AVERAGE OF FROM 1.5 TO 3.5 HYDROXYL GROUPS ARE ESTERIFIED WITH AN ALKANOIC ACID HAVING FROM 4 TO 8 CARBON ATOMS.
References Cited (Backward Citations)
US1990483A
Cited
US2381247A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |