US2641597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furans and method of production
Assignee: F Hoffmann La Roche AG
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Filing: 1952-02-01
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Granted: 1953-06-09
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Expires: 1972-02-01
Abstract
No abstract record available.
Inventors
- 👤 Goldberg Moses Wolf
- 👤 Rachlin Albert Israel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:18
CPC Classifications
C; C07; C07D; C07D405/00; C07D405/02; C07D405/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
39 words
A COMPOSITION OF THE CLASS CONSISTING OF 2PHENYL-5-(R-PHENYL) FURANS AND THE ACID ADDITION SALTS THEREOF, WHEREIN R IS A MEMBER OF THE GROUP CONSISTING OF 4,5-DIHYDRO-2-IMIDAZOLYL, 4,5-DIHYDRO - C - LOWER ALKYL - 2 - IMIDAZOLYL, AND 1,4,5,6-TETRAHYDRO-2-PYRIMIDYL RADICALS.
Claim 2
Dependent Claim
39 words
A COMPOSITION OF THE CLASS CONSISTING OF 2PHENYL-5-(R-PHENYL) FURANS AND THE ACID ADDITION SALTS THEREOF, WHEREIN R IS A MEMBER OF THE GROUP CONSISTING OF 4,5-DIHYDRO-2-IMIDAZOLYL, 4,5-DIHYDRO - C - LOWER ALKYL - 2 - IMIDAZOLYL, AND 1,4,5,6-TETRAHYDRO-2-PYRIMIDYL RADICALS.
Claim 3
Dependent Claim
44 words
A PROCES WHICH COMPRISES REACTING A 2PHENYL-5-((A-IMINO LOWER ALKOXY METHYL) PHENYLLFURAN HYDROCHLORIDE WITH A MEMBER OF THE GROUP CONSISTING OF 1,2-DIAMINO- AND 1,3-DIAMINO ALKANES TO FORM 2-PHENYL-5-(R-PHENYL) FURANS, WHEREIN R IS A MEMBER OF THE GROUP CONSISTING OF 4,5-DIHYDRO-2-IMIDAZOLYL, 4,5-DIHYDROC-LOWER ALKYL-2-IMIDAZOLYL, AND 1,4,5,6-TETRAHYDRO-2-PYRIMIDYL RADICALS.
Claim 4
Dependent Claim
44 words
A PROCES WHICH COMPRISES REACTING A 2PHENYL-5-((A-IMINO LOWER ALKOXY METHYL) PHENYLLFURAN HYDROCHLORIDE WITH A MEMBER OF THE GROUP CONSISTING OF 1,2-DIAMINO- AND 1,3-DIAMINO ALKANES TO FORM 2-PHENYL-5-(R-PHENYL) FURANS, WHEREIN R IS A MEMBER OF THE GROUP CONSISTING OF 4,5-DIHYDRO-2-IMIDAZOLYL, 4,5-DIHYDROC-LOWER ALKYL-2-IMIDAZOLYL, AND 1,4,5,6-TETRAHYDRO-2-PYRIMIDYL RADICALS.
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 |