US3312683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing derivatives of d-glucose
Assignee: F Hoffmann La Roche AG
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Filing: 1964-06-09
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Granted: 1967-04-04
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Expires: 1984-06-09
Abstract
No abstract record available.
Inventors
- 👤 Farkas Walter Gerald
- 👤 Frederick H Hemsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:05
CPC Classifications
C; C07; C07H; C07H13/00; C07H13/12; C07C; C07C59/00; C07C59/01; C07C59/10; C07C59/105; C07H3/00; C07H3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
THE PROCESS WHICH COMPRISES TREATING D-GLUCOSE WITH AN ALKALINE EARTH METAL HYDROXIDE IN THE PRESENCE OF AS A LIQUID REACTION MEDIUM AN INERT ORGANIC COMPOUND WHICH FORMS A MINIMUM BOILING AZEOTROPE WITH WATER BOILING WITHIN THE RANGE OF ABOUT 70*C. TO ABOUT 100*C., SAID TREATMENT BEING EFFECTED AT AN ELEVATED TEMPERATURE SUCH THAT THE WATER OF REACTION IS CONTINUOUSLY DISTILLED FROM THE REACTION MIXTURE AS AN AZEOTROPE WITH SAID INERT ORGANIC COMPOUND.
Claim 2
Dependent Claim
72 words
THE PROCESS WHICH COMPRISES TREATING D-GLUCOSE WITH AN ALKALINE EARTH METAL HYDROXIDE IN THE PRESENCE OF AS A LIQUID REACTION MEDIUM AN INERT ORGANIC COMPOUND WHICH FORMS A MINIMUM BOILING AZEOTROPE WITH WATER BOILING WITHIN THE RANGE OF ABOUT 70*C. TO ABOUT 100*C., SAID TREATMENT BEING EFFECTED AT AN ELEVATED TEMPERATURE SUCH THAT THE WATER OF REACTION IS CONTINUOUSLY DISTILLED FROM THE REACTION MIXTURE AS AN AZEOTROPE WITH SAID INERT ORGANIC COMPOUND.
References Cited (Backward Citations)
US2602084A
Cited
GB768250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |