Patent US2427255A successfully refreshed from Google Patents.
US2427255A
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Artificial waxes comprising reaction products of maleic anhydride and partial esters of stearic acid and polyhydric alcohols of the pentaerythritol series, methods for preparing, and compositions containing the same
Assignee: HAYDEN CHEMICAL CORP
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Filing: 1942-07-28
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Granted: 1947-09-09
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Expires: 1962-07-28
Abstract
No abstract record available.
Inventors
- 👤 Burrell Harry
- 👤 Philip I Bowman
- 👤 Robert H Barth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:00
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/54; C08G63/553; C08G63/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1914100A
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US2033131A
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US2029851A
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US2025612A
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GB468533A
Cited
US2188887A
Cited
US2275494A
Cited
US2234934A
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US2315708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-08 | 1951-03-10 | 1951-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-08 | 1955-03-10 | 1955-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-08 | 1959-03-10 | 1959-09-09 | $7700.00 | Window Closed / Lapsed |