Patent US2573701A successfully refreshed from Google Patents.
US2573701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene glycol esters of acyloxycarboxylic acids
Assignee: Individual
•
Filing: 1948-06-18
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Granted: 1951-11-06
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Expires: 1968-06-18
Abstract
No abstract record available.
Inventors
- 👤 Edward M Filachione
- 👤 Martin L Fein
- 👤 Charles H Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:26
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/823
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A POLYETHYLENE GLYCOL ESTER CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
8 words
A POLYETHYLENE GLYCOL ESTER CORRESPONDING TO THE FORMULA
References Cited (Backward Citations)
US2072102A
Cited
GB445223A
Cited
US2106703A
Cited
US2151185A
Cited
US2158107A
Cited
GB505651A
Cited
US2290128A
Cited
US2196758A
Cited
US2231729A
Cited
US2359750A
Cited
US2388164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-05 | 1955-05-07 | 1955-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-05 | 1959-05-07 | 1959-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-05 | 1963-05-07 | 1963-11-06 | $7700.00 | Window Closed / Lapsed |