Patent US2504165A successfully refreshed from Google Patents.
US2504165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing tetraethyl pyrophosphate
Assignee: Victor Chemical Works
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Filing: 1947-03-21
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Granted: 1950-04-18
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Expires: 1967-03-21
Abstract
No abstract record available.
Inventors
- 👤 Toy Arthur Dock Fon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:07
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/098
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
THE METHOD OF PRODUCING TETRAETHYL PYROPHOSPHATE WHICH COMPRISES ASSOCIATING DIETHYL HALOGEN-PHOSPHATE WITH WATER AT A TEMPERATURE OF FROM 0* TO 35*C. TO FORM THE PYROPHOSPHATE ESTER AND HYDROGEN HALIDE, AND REMOVING THE HYDROGEN HALIDE SUBSTANTIALLY AS IT IS FORMED, THE TIME OF CONTACT OF THE REACTANTS BEING LIMITED SO THAT THE PYROPHOSPHATE ESTER IS NOT APPRECIABLY FURTHER HYDROLYZED.
Claim 2
Independent Claim
58 words
THE METHOD OF PRODUCING TETRAETHYL PYROPHOSPHATE WHICH COMPRISES ASSOCIATING DIETHYL HALOGEN-PHOSPHATE WITH WATER AT A TEMPERATURE OF FROM 0* TO 35*C. TO FORM THE PYROPHOSPHATE ESTER AND HYDROGEN HALIDE, AND REMOVING THE HYDROGEN HALIDE SUBSTANTIALLY AS IT IS FORMED, THE TIME OF CONTACT OF THE REACTANTS BEING LIMITED SO THAT THE PYROPHOSPHATE ESTER IS NOT APPRECIABLY FURTHER HYDROLYZED.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-17 | 1953-10-17 | 1954-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-17 | 1957-10-17 | 1958-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-17 | 1961-10-17 | 1962-04-18 | $7700.00 | Window Closed / Lapsed |