Patent US3201385A successfully refreshed from Google Patents.
US3201385A
Expired / Lapsed
US
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Synthesis of arbutin
Assignee: Polaroid Corp
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Filing: 1963-02-11
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Granted: 1965-08-17
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Expires: 1983-02-11
Abstract
No abstract record available.
Inventors
- 👤 Arthur D Jarrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:03
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/20; C07H15/203
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
THE PROCESS OF PREPARING ARBUTIN COMPRISING (A) REFLUXING HYDROQUINONE MONBOBENZYLETHER AND B-D-GLUCOSE PENTAACETATE WITH PHOSPHORUS OXYCHLORIDE TO FORM BENZYLARBUTIN TETRAACETATE, (B) REACTING SAID BENZYLARBUTIN TETRAACETATE WITH SODIUM AND METHANOL TO FORM BENZYLARBUTIN, AND (C) HYDROGENATING SAID BENZYLARBUTIN TO ARBUTIN.
Claim 2
Dependent Claim
39 words
THE PROCESS OF PREPARING ARBUTIN COMPRISING (A) REFLUXING HYDROQUINONE MONBOBENZYLETHER AND B-D-GLUCOSE PENTAACETATE WITH PHOSPHORUS OXYCHLORIDE TO FORM BENZYLARBUTIN TETRAACETATE, (B) REACTING SAID BENZYLARBUTIN TETRAACETATE WITH SODIUM AND METHANOL TO FORM BENZYLARBUTIN, AND (C) HYDROGENATING SAID BENZYLARBUTIN TO ARBUTIN.
References Cited (Backward Citations)
FR1013503A
Cited
US3073788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |