US2745857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glycolic acid ethers of polyoxypropylene compounds and method of preparation
Assignee: Dow Chemical Co
•
Filing: 1952-02-23
•
Granted: 1956-05-15
•
Expires: 1972-02-23
Abstract
No abstract record available.
Inventors
- 👤 Edgar C Britton
- 👤 Peter S Petrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:01
CPC Classifications
C; C07; C07C; C07C59/00; C07C59/125; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
A COMPOSITION SELECTED FROM THE GROUP CONSISTING OF A MIXTURE OF GLYCOLIC ACID ETHERS OF MONOALKYL ETHERS OF POLYPROPYLENE GLYCOLS AND SALTS THEREOF HAVING THE PROBABLE FORMULA:
Claim 2
Dependent Claim
27 words
A COMPOSITION SELECTED FROM THE GROUP CONSISTING OF A MIXTURE OF GLYCOLIC ACID ETHERS OF MONOALKYL ETHERS OF POLYPROPYLENE GLYCOLS AND SALTS THEREOF HAVING THE PROBABLE FORMULA:
References Cited (Backward Citations)
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US2010154A
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US2083482A
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US2183853A
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FR800079A
Cited
GB470181A
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US2210874A
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GB490416A
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CH228415A
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US2280792A
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US2653972A
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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) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |