Patent US2578652A successfully refreshed from Google Patents.
US2578652A
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Addition product of diester of dithiophosphoric acid and maleic acid and its esters, and method of preparation
Assignee: Wyeth Holdings LLC
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Filing: 1950-03-02
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Granted: 1951-12-18
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Expires: 1970-03-02
Abstract
No abstract record available.
Inventors
- 👤 Jack T Cassaday
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:36
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/167; C23F11/1673; A; A01; A01N; A01N57/00; A01N57/10; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165; C07F9/1651; C08; C08K; C08K5/00; C08K5/49; C08K5/5398; C10; C10M; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C10M137/105; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/047; C10N; C10N2030/00; C10N2030/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
PHOSPHATE ESTERS OF THE GENERAL FORMULA
Claim 2
Dependent Claim
6 words
PHOSPHATE ESTERS OF THE GENERAL FORMULA
References Cited (Backward Citations)
US2528732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |