Patent US2733273A successfully refreshed from Google Patents.
US2733273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of asymmetrical bisphenols
Assignee: —
•
Filing: —
•
Granted: 1956-01-31
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Expires: 1973-01-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:27
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
PROCESS FOR PREPARING ASYMMETRICAL HALOGENATED ALKYL BISPHENOLS COMPRISING THE STEPS OF ACETYLATING A COMPOUND OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
18 words
PROCESS FOR PREPARING ASYMMETRICAL HALOGENATED ALKYL BISPHENOLS COMPRISING THE STEPS OF ACETYLATING A COMPOUND OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US1880566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-30 | 1959-08-01 | 1960-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-30 | 1963-08-01 | 1964-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-30 | 1967-08-01 | 1968-01-31 | $7700.00 | Window Closed / Lapsed |