Patent US2583991A successfully refreshed from Google Patents.
US2583991A
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Heterogeneous, acidic hydrolysis of polymeric esters with alkyl phosphoric acid esters
Assignee: EIDP Inc
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Filing: 1947-09-05
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Granted: 1952-01-29
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Expires: 1967-09-05
Abstract
No abstract record available.
Inventors
- 👤 Roe C Blume
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:09
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/32; D06M11/36; D06M11/38; D06M11/385; C; C08; C08B; C08B3/00; C08B3/22; C08B3/24; C08F; C08F8/00; C08F8/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A PROCESS COMPRISING THE HETEROGENEOUS HYDROLYSIS OF WATER-INSOLUBLE POLYMERIC CARBOXYLIC ACID ESTERS IN AQUEOUS MEDIA CONTAINING A STRONG ORTHOPHOSPHORIC ACID ESTER SELECTED FROM THE GROUP CONSISTING OF MONO- AND DIALKYL ORTHOPHOSPHORIC ACID ESTERS THE ALKYL GROUPS OF WHICH HAVE FROM THREE TO TEN CARBON ATOMS, THESE SAID ACID ESTERS BEING APPRECIABLE SOLUBLE IN THE SAID POLYMERIC ESTERS IN THE PRESENCE OF WATER.
Claim 2
Dependent Claim
62 words
A PROCESS COMPRISING THE HETEROGENEOUS HYDROLYSIS OF WATER-INSOLUBLE POLYMERIC CARBOXYLIC ACID ESTERS IN AQUEOUS MEDIA CONTAINING A STRONG ORTHOPHOSPHORIC ACID ESTER SELECTED FROM THE GROUP CONSISTING OF MONO- AND DIALKYL ORTHOPHOSPHORIC ACID ESTERS THE ALKYL GROUPS OF WHICH HAVE FROM THREE TO TEN CARBON ATOMS, THESE SAID ACID ESTERS BEING APPRECIABLE SOLUBLE IN THE SAID POLYMERIC ESTERS IN THE PRESENCE OF WATER.
References Cited (Backward Citations)
US2121899A
Cited
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 |