Patent US2630451A successfully refreshed from Google Patents.
US2630451A
Expired / Lapsed
US
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Dithiophosphate esters
Assignee: Wyeth Holdings LLC
•
Filing: 1951-12-08
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Granted: 1953-03-03
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Expires: 1971-12-08
Abstract
No abstract record available.
Inventors
- 👤 John H Fletcher
- 👤 Erick I Hoegberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:27
CPC Classifications
C; C10; C10M; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C10M137/105; A; A01; A01N; A01N57/00; A01N57/10; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165; C07F9/1651; C07F9/547; C07F9/655; C07F9/65515; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/047
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A DITHIOPHOSPHATE ESTER OF THE FORMULA
Claim 2
Dependent Claim
6 words
A DITHIOPHOSPHATE ESTER OF THE FORMULA
References Cited (Backward Citations)
US2494283A
Cited
US2578652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-02 | 1956-09-01 | 1957-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-02 | 1960-09-01 | 1961-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-02 | 1964-09-01 | 1965-03-03 | $7700.00 | Window Closed / Lapsed |