Patent US2583549A successfully refreshed from Google Patents.
US2583549A
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Preparation of pentaerythrityl phosphates
Assignee: Individual
•
Filing: 1950-04-25
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Granted: 1952-01-29
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Expires: 1970-04-25
Abstract
No abstract record available.
Inventors
- 👤 George C Daul
- 👤 John D Reid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:34
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/093; C07F9/091
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
33 words
A METHOD FOR PRODUCING PENTAERYTHRITYL PHOSPHATES WHICH COMPRISES HEATING A MIXTURE OF PENTAERYTHRITOL AND UREA PHOSPHATE TO A TEMPERATURE WITHIN THE RANGE OF 130* TO 180* C. UNTIL EVOLUTION OF WATER VAPOR CEASES.
Claim 2
Independent Claim
33 words
A METHOD FOR PRODUCING PENTAERYTHRITYL PHOSPHATES WHICH COMPRISES HEATING A MIXTURE OF PENTAERYTHRITOL AND UREA PHOSPHATE TO A TEMPERATURE WITHIN THE RANGE OF 130* TO 180* C. UNTIL EVOLUTION OF WATER VAPOR CEASES.
Claim 3
Dependent Claim
7 words
THE DIAMMONIUM SALT OF MONO-PENTAERYTHRITYL TETRA-ORTHOPHOSPHORIC ACID.
Claim 4
Dependent Claim
7 words
THE DIAMMONIUM SALT OF MONO-PENTAERYTHRITYL TETRA-ORTHOPHOSPHORIC ACID.
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) | 1955-01-28 | 1955-07-30 | 1956-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-28 | 1959-07-30 | 1960-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-28 | 1963-07-30 | 1964-01-29 | $7700.00 | Window Closed / Lapsed |