Patent US2679650A successfully refreshed from Google Patents.
Patent US2628256A successfully refreshed from Google Patents.
US2628256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of aromatic aldehydes
Assignee: Individual
•
Filing: 1951-06-08
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Granted: 1953-02-10
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Expires: 1971-06-08
Abstract
No abstract record available.
Inventors
- 👤 Tod W Campbell
- 👤 Galvin M Coppinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:40
CPC Classifications
C; C07; C07C; C07C201/00; C07C201/06; C07C201/12; C07C45/00; C07C45/27
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A PROCESS FOR PREPARING AROMATIC ALDEHYDES WHICH COMPRISES REACTING AT A TEMPERATURE FROM ABOUT 25* C. TO ABOUT 100* C. AN AROMATIC METHYL HALIDE WITH AN ALKALI METAL SALT OF AN ORGANIC HYDROPEROXIDE.
Claim 2
Dependent Claim
33 words
A PROCESS FOR PREPARING AROMATIC ALDEHYDES WHICH COMPRISES REACTING AT A TEMPERATURE FROM ABOUT 25* C. TO ABOUT 100* C. AN AROMATIC METHYL HALIDE WITH AN ALKALI METAL SALT OF AN ORGANIC HYDROPEROXIDE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-10 | 1956-08-11 | 1957-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-10 | 1960-08-11 | 1961-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-10 | 1964-08-11 | 1965-02-10 | $7700.00 | Window Closed / Lapsed |