Patent US986355A successfully refreshed from Google Patents.
US3062884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic hydrogenation of 2, 5-dialkoxy-beta-nitrostyrene to produce beta-aminoethylhydroquinone
Assignee: Polaroid Corp
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Filing: 1955-06-08
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Granted: 1962-11-06
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Expires: 1975-06-08
Abstract
No abstract record available.
Inventors
- 👤 Green Milton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:10
CPC Classifications
C; C07; C07C; C07C213/00; C07C213/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
THE PROCESS OF PREPARING A 2,5-DIALKOXY-PHENETHYLAMINE WHICH COMPRISES HYDROGENATING A 2,5-DIALKOXY-BNITROSTYRENE IN THE PRESENCE OF A PALLADINIZED BARIUM SULFATE CATALYST IN A MIXTURE OF ACETIC AND SULFURIC ACIDS AS THE REACTION MEDIUM.
Claim 2
Dependent Claim
32 words
THE PROCESS OF PREPARING A 2,5-DIALKOXY-PHENETHYLAMINE WHICH COMPRISES HYDROGENATING A 2,5-DIALKOXY-BNITROSTYRENE IN THE PRESENCE OF A PALLADINIZED BARIUM SULFATE CATALYST IN A MIXTURE OF ACETIC AND SULFURIC ACIDS AS THE REACTION MEDIUM.
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) | 1965-11-05 | 1966-05-07 | 1966-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-05 | 1970-05-07 | 1970-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-05 | 1974-05-07 | 1974-11-06 | $7700.00 | Window Closed / Lapsed |