US2951100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halomethylation
Assignee: Standard Oil Co
•
Filing: 1957-02-28
•
Granted: 1960-08-30
•
Expires: 1977-02-28
Abstract
No abstract record available.
Inventors
- 👤 Chester E Adams
- 👤 Delbert H Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:36
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/26; C07C17/32; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
94 words
A PROCESS FOR ATTACHING AT LEAST ONE HALOMETHYL RADICAL TO THE HYDROCARBON NUCLEUS OF AN AROMATIC COMPOUND SELECTED FROM THE CLASS CONSISTING OF AN ALKYL BENZENE AND A SUBSTITUTED AROMATIC HYDROCARBON HAVING A PLURALITY OF SUBSTITUENTS, SAID SUBSTITUENTS BEING SELECTED FROM THE CLASS CONSISTING OF CHLOROMETHYL AND BROMOMETHYL GROUPS, WHICH PROCESS COMPRISES REACTING SAID AROMATIC COMPOUND WITH FORMALDEHYDE IN THE PRESENCE OF A STIOCHIOMETRIC EXCESS OF A HYDROGEN HALIDE AT A PRESSURE ABOVE ABOUT 100 POUNDS PER SQUARE INCH, SAID HYDROGEN HALIDE BEING SELECTED FROM THE CLASS CONSISTING OF HYDROGEN CHLORIDE AND HYDROGEN BROMIDE.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-30 | 1964-02-29 | 1964-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-30 | 1968-02-29 | 1968-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-30 | 1972-02-29 | 1972-08-30 | $7700.00 | Window Closed / Lapsed |