Patent US2602822A successfully refreshed from Google Patents.
US2602822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of bis (hydroxyphenyl) compounds
Assignee: Shell Development Co
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Filing: 1951-07-23
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Granted: 1952-07-08
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Expires: 1971-07-23
Abstract
No abstract record available.
Inventors
- 👤 Carl G Schwarzer
- 👤 Seaver A Ballard
- 👤 Jr Daniel B Luten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:10
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
81 words
THE PROCESS FOR THE PRODUCTION OF HYDROXYPHENYL-SUBSTITUTED COMPOUNDS WHEREIN THE NUCLEI OF TWO PHENOLIC RADICALS ARE DIRECTLY ATTACHED TO A SINGLE CARBON ATOM WHICH COMPRISES REACTING AN UNSATURATED HALOGENATED HYDROCARBON HAVING AT LEAST THREE CARBON ATOMS TO THE MOLECULE POSSESSING AN OLEFINIC LINKAGE BETWEEN TWO CARBON ATOMS OF ALIPHATIC CHARACTER AND WHEREIN THE NON-OLEFINIC BONDS OF ONE OF THE OLEFINICALLY UNSATURATED CARBON ATOMS IS DIRECTLY ATTACHED TO A HALOGEN AND A CARBON ATOM WITH A PHENOLIC COMPOUND IN AN ACIDIC MEDIUM.
References Cited (Backward Citations)
US2257201A
Cited
US2315556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-08 | 1956-01-07 | 1956-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-08 | 1960-01-07 | 1960-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-08 | 1964-01-07 | 1964-07-08 | $7700.00 | Window Closed / Lapsed |