US3029291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making alkylidenebis
Assignee: Dow Chemical Co
•
Filing: 1959-03-12
•
Granted: 1962-04-10
•
Expires: 1979-03-12
Abstract
No abstract record available.
Inventors
- 👤 Andrew J Dietzler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:18
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/62; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A METHOD FOR PRODUCING AN ALKYLIDENEBIS(DIBROMOPHENOL) WHICH COMPRISES REACTING AN ALKYLIDENEBISPHENOL WITH ABOUT 4 TO 4.5 MOLAR EQUIVALENTS OF BROMINE IN THE PRESENCE OF AN AQUEOUS LOWER ALKANOL SOLVENT HAVING FROM 1 TO 3 CARBON ATOMS AT A TEMPERATURE BETWEEN ABOUT 0* AND ABOUT 50*C.
Claim 2
Independent Claim
45 words
A METHOD FOR PRODUCING AN ALKYLIDENEBIS(DIBROMOPHENOL) WHICH COMPRISES REACTING AN ALKYLIDENEBISPHENOL WITH ABOUT 4 TO 4.5 MOLAR EQUIVALENTS OF BROMINE IN THE PRESENCE OF AN AQUEOUS LOWER ALKANOL SOLVENT HAVING FROM 1 TO 3 CARBON ATOMS AT A TEMPERATURE BETWEEN ABOUT 0* AND ABOUT 50*C.
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) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |