US2853485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of reacting carbohydrates with various reagents in the presence of 2-pyrrolidone or nu-methyl-2-pyrrolidone
Assignee: GAF Chemicals Corp
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Filing: 1955-05-19
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Granted: 1958-09-23
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Expires: 1975-05-19
Abstract
No abstract record available.
Inventors
- 👤 Werner Jesse
- 👤 Frederick A Hessel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:49
CPC Classifications
C; C08; C08B; C08B37/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
THE PROCESS OF REACTING AT LEAST ONE HYDROXY GROUP OF A POLYHYDROXY ORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF MONO-, DI-, TRI- AND POLY- SACCHARIDES WITH A REAGENT REACTIVE WITH SAID HYDROXY GROUP AND SOLUBLE OR DISPERSIBLE IN PYRROLIDONES WHICH COMPRISES CONDUCTING THE REACTION IN THE PRESENCE OF A PYRROLIDONE SELECTED FROM THE GROUP CONSISTING OF 2-PYRROLIDONE AND N-METHYL-2-PYRROLIDONE.
Claim 2
Dependent Claim
60 words
THE PROCESS OF REACTING AT LEAST ONE HYDROXY GROUP OF A POLYHYDROXY ORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF MONO-, DI-, TRI- AND POLY- SACCHARIDES WITH A REAGENT REACTIVE WITH SAID HYDROXY GROUP AND SOLUBLE OR DISPERSIBLE IN PYRROLIDONES WHICH COMPRISES CONDUCTING THE REACTION IN THE PRESENCE OF A PYRROLIDONE SELECTED FROM THE GROUP CONSISTING OF 2-PYRROLIDONE AND N-METHYL-2-PYRROLIDONE.
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) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |