US2728790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyzed process for preparation of phosphates and phosphites
Assignee: EIDP Inc
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Filing: 1954-03-11
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Granted: 1955-12-27
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Expires: 1974-03-11
Abstract
No abstract record available.
Inventors
- 👤 Sroog Cyrus Efrem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:34
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
THE PROCESS WHICH COMPRISES REACTING A GLYCOL OF THE SERIES HO(CH2)NOH, WHEREIN N IS AN INTEGER FROM 2-10 INCLUSIVE, WITH A PHOSPHORUS COMPOUND FROM THE GROUP CONSISTING OF ALKYL, ALKYL PHENYL, AND PHENYL PHOSPHATES AND PHOSPHITES IN THE PRESENCE OF A CATALYST FROM THE GROUP CONSISTING OF LITHIUM, SODIUM AND CALCIUM HYDRIDES.
Claim 2
Dependent Claim
52 words
THE PROCESS WHICH COMPRISES REACTING A GLYCOL OF THE SERIES HO(CH2)NOH, WHEREIN N IS AN INTEGER FROM 2-10 INCLUSIVE, WITH A PHOSPHORUS COMPOUND FROM THE GROUP CONSISTING OF ALKYL, ALKYL PHENYL, AND PHENYL PHOSPHATES AND PHOSPHITES IN THE PRESENCE OF A CATALYST FROM THE GROUP CONSISTING OF LITHIUM, SODIUM AND CALCIUM HYDRIDES.
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) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |