US2705710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid catalyzed esterification of cellulose pretreated with an nu, nu-dialkyl amide
Assignee: EIDP Inc
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Filing: 1952-02-08
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Granted: 1955-04-05
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Expires: 1972-02-08
Abstract
No abstract record available.
Inventors
- 👤 Roe C Blume
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:16
CPC Classifications
C; C08; C08B; C08B3/00; C08B3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A PROCESS FOR THE ESTERIFICATION OF CELLULOSE COMPRISING THE STEPS OF COMMINGLING CELLULOSE WITH A SHORT CHAIN N,N-DIALKYL SUBSTITUTED AMIDE OF A LOWER FATTY ACID, HEATING AND THEN ADDING LOWER FATTY ACID ESTERIFYING AGENT AND A STRONG INORGANIC ACID CATALYST.
Claim 2
Dependent Claim
40 words
A PROCESS FOR THE ESTERIFICATION OF CELLULOSE COMPRISING THE STEPS OF COMMINGLING CELLULOSE WITH A SHORT CHAIN N,N-DIALKYL SUBSTITUTED AMIDE OF A LOWER FATTY ACID, HEATING AND THEN ADDING LOWER FATTY ACID ESTERIFYING AGENT AND A STRONG INORGANIC ACID CATALYST.
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) | 1958-04-04 | 1958-10-04 | 1959-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-04 | 1962-10-04 | 1963-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-04 | 1966-10-04 | 1967-04-05 | $7700.00 | Window Closed / Lapsed |