US2632020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dithiophosphate esters
Assignee: Wyeth Holdings LLC
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Filing: 1951-07-07
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Granted: 1953-03-17
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Expires: 1971-07-07
Abstract
No abstract record available.
Inventors
- 👤 Erick I Hoegberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:46
CPC Classifications
C; C10; C10M; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C10M137/105; A; A01; A01N; A01N57/00; A01N57/10; B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/014; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165; C07F9/1651; C08; C08K; C08K5/00; C08K5/49; C08K5/5398; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/047
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
PHOSPHATE ESTERS OF THE GENERAL FORMULA IN WHICH R1 AND R2 ARE CHOSEN FROM THE GROUP CONSISTING OF ALKYL, ARALKYL, ARYL AND ALKARYL RADICALS, AND R3 AND R4 ARE MEMBERS OF THE GROUP CONSISTING OF HYDROGEN AND THE METHYL RADICAL.
Claim 2
Dependent Claim
40 words
PHOSPHATE ESTERS OF THE GENERAL FORMULA IN WHICH R1 AND R2 ARE CHOSEN FROM THE GROUP CONSISTING OF ALKYL, ARALKYL, ARYL AND ALKARYL RADICALS, AND R3 AND R4 ARE MEMBERS OF THE GROUP CONSISTING OF HYDROGEN AND THE METHYL RADICAL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |