US3776985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous production of primary and secondary phosphate ester admixture
Assignee: Rhone Poulenc Surfactants and Specialties LP
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Filing: 1971-05-26
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Granted: 1973-12-04
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Expires: 1991-05-26
Abstract
Abstract THIS INVENTION RELATES TO THE PRODUCTION OF SURFACE ACTIVE COMPOSITIONS, AND MORE PARTICULARLY TO AN IMPROVED PROCESS FOR CONTINUOUSLY PREPARING SURFACE ACTIVE COMPOSITONS CONTAINING UNIFORM MIXTURES OF PRIMARY AND SECONDARY PHOSPHATE ESTERS OF ORGANIC HYDROXYL COMPOUNDS.
Inventors
- 👤 L Nehmsmann
- 👤 L Schenck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:41
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08
Claims Analysis
Total Claims: 0
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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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |