US2427255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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 08:33
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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GB468533A
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US2275494A
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US2234934A
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US2315708A
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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 |