US2590852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of acylated lactic acid
Assignee: United States Department of Agriculture
•
Filing: 1947-11-20
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Granted: 1952-04-01
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Expires: 1967-11-20
Abstract
No abstract record available.
Inventors
- 👤 Martin L Fein
- 👤 Charles H Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:23
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/15; C08K5/151; C08K5/1535
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A PLASTICIZER AND MODIFIER FOR POLYVINYLCHLORIDE-ACETATE RESINS BEING A COMPOUND CORRESPONDING TO THE GENERAL FORMULA:
Claim 2
Dependent Claim
15 words
A PLASTICIZER AND MODIFIER FOR POLYVINYLCHLORIDE-ACETATE RESINS BEING A COMPOUND CORRESPONDING TO THE GENERAL FORMULA:
References Cited (Backward Citations)
US1927295A
Cited
US2122716A
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US2046150A
Cited
US2232933A
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US2222363A
Cited
US2421378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |