Patent US2641601A successfully refreshed from Google Patents.
US2641601A
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Furans and method of preparation
Assignee: F Hoffmann La Roche AG
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Filing: 1950-11-24
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Granted: 1953-06-09
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Expires: 1970-11-24
Abstract
No abstract record available.
Inventors
- 👤 Goldberg Moses Wolf
- 👤 Rachlin Albert Israel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:31
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/56; C07D307/38; C07D307/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A COMPOUND OF THE CLASS CONSISTING OF 2,5DIPHENYL-FURANS AND 2,5-DIPHENYL-MONOCHLOROFURANS WHEREIN AT LEAST ONE OF THE PHENYLS HAS ATTACHED THERETO A MEMBER OF THE GROUP CONSISTING OF GUANYL, AND DIALKYLAMINOALKYCARBONYL RADICALS, AND THE ACID ADDITION SALTS THEREOF.
Claim 2
Dependent Claim
37 words
A COMPOUND OF THE CLASS CONSISTING OF 2,5DIPHENYL-FURANS AND 2,5-DIPHENYL-MONOCHLOROFURANS WHEREIN AT LEAST ONE OF THE PHENYLS HAS ATTACHED THERETO A MEMBER OF THE GROUP CONSISTING OF GUANYL, AND DIALKYLAMINOALKYCARBONYL RADICALS, AND THE ACID ADDITION SALTS THEREOF.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |