Patent US2552227A successfully refreshed from Google Patents.
US2552227A
Expired / Lapsed
US
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Method for preparing esters of 1, 1, 3-alkanetriols
Assignee: Shell Development Co
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Filing: 1946-11-12
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Granted: 1951-05-08
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Expires: 1966-11-12
Abstract
No abstract record available.
Inventors
- 👤 Curtis W Smith
- 👤 Douglas G Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:39
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A PROCESS FOR THE PREPARATION OF TRIESTERS WHICH COMPRISES REACTING AN ALIPHATIC MONOCARBOXYLIC ACID DIESTER OF 2-PROPENE-1,1-DIOL WITH AN ALIPHATIC MONOCARBOXYLIC ACID IN THE PRESENCE OF A CATALYTIC AMOUNT OF A STRONG MINERAL ACID TO PRODUCE A MONOCARBOXYLIC ACID TRIESTER OF 1,1,3PROPANETRIOL.
Claim 2
Dependent Claim
42 words
A PROCESS FOR THE PREPARATION OF TRIESTERS WHICH COMPRISES REACTING AN ALIPHATIC MONOCARBOXYLIC ACID DIESTER OF 2-PROPENE-1,1-DIOL WITH AN ALIPHATIC MONOCARBOXYLIC ACID IN THE PRESENCE OF A CATALYTIC AMOUNT OF A STRONG MINERAL ACID TO PRODUCE A MONOCARBOXYLIC ACID TRIESTER OF 1,1,3PROPANETRIOL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |