US2341846A
Expired / Lapsed
US
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Polyhydric alcohol ethers of aliphatic polycarboxylic acid esters and their preparation
Assignee: Wyeth Holdings LLC
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Filing: 1941-06-24
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Granted: 1944-02-15
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Expires: 1961-06-24
Abstract
No abstract record available.
Inventors
- 👤 Edmund R Meincke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:58
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/10; D21C9/1026; D21C9/1036; D21H; D21H13/00; D21H13/10; D21H13/20; D21H13/24; D21H17/00; D21H17/03; D21H17/05; D21H17/14; D21H17/15; D21H5/00; D21H5/12; D21H5/1254; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1947-02-14 | 1947-08-16 | 1948-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-02-14 | 1951-08-16 | 1952-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-02-14 | 1955-08-16 | 1956-02-15 | $7700.00 | Window Closed / Lapsed |