Patent US2811566A successfully refreshed from Google Patents.
US2811566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogenated phenols
Assignee: PPG Industries Inc
•
Filing: 1954-10-21
•
Granted: 1957-10-29
•
Expires: 1974-10-21
Abstract
No abstract record available.
Inventors
- 👤 Alfred R Bader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:16
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/14; C07; C07C; C07C37/00; C07C37/62
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
58 words
THE METHOD WHICH COMPRISES REACTING A HALOGEN WITH AN ALKENYLPHENOL CONTINUING THE REACTION UNTIL EVOLUTION OF HYDROGEN HALIDE BEGINS AND SUBSTANTIALLY CEASES, AND RECOVERING FROM THE REACTION MIXTURE A POLYHALO COMPOUNDS IN WHICH TWO HALOGEN ATOMS ARE ADDED TO EACH SIDE CHAIN DOUBLE BOND OF THE ALKENYLPHENOL, AND TWO ADDITIONAL HALOGEN ATOMS ARE ATTACHED TO EACH PHENOLIC NUCLEUS.
References Cited (Backward Citations)
US2122581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |