US2577867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of beta-methylcrotonaldehyde
Assignee: Merck and Co Inc
•
Filing: 1950-04-01
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Granted: 1951-12-11
•
Expires: 1970-04-01
Abstract
No abstract record available.
Inventors
- 👤 Norman L Wendler
- 👤 Harry L Slates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:59
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/48; C07C45/00; C07C45/51; C07C45/511; C07C45/515
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
THE PROCESS FOR PREPARING B-METHYLCROTONALDEHYDE WHICH COMPRISES INTIMATELY CONTACTING AN ESTER OF THE FORMULA
Claim 2
Dependent Claim
14 words
THE PROCESS FOR PREPARING B-METHYLCROTONALDEHYDE WHICH COMPRISES INTIMATELY CONTACTING AN ESTER OF THE FORMULA
References Cited (Backward Citations)
US2175556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |