US2802856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of preparing tri-esters of thiophosphoric acids
Assignee: Lubrizol Corp
•
Filing: 1953-09-08
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Granted: 1957-08-13
•
Expires: 1973-09-08
Abstract
No abstract record available.
Inventors
- 👤 George R Norman
- 👤 Suer William M Le
- 👤 Thomas W Mastin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:20
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
THE METHOD OF PRODUCING TRI-ESTERS OF THIOPHOSPHORIC ACIDS WHICH COMPRISES REACTING: (A) THIOPHOSPHORIC ACIDS OF THE FOLLOWING STRUCTURE
Claim 2
Independent Claim
18 words
THE METHOD OF PRODUCING TRI-ESTERS OF THIOPHOSPHORIC ACIDS WHICH COMPRISES REACTING: (A) THIOPHOSPHORIC ACIDS OF THE FOLLOWING STRUCTURE
References Cited (Backward Citations)
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Cited
US2565921A
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US2565920A
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US2578652A
Cited
US2632020A
Cited
US2630451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |