US3050520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing 2-olefinic imidazoles
Assignee: Air Products and Chemicals Inc
•
Filing: 1960-03-31
•
Granted: 1962-08-21
•
Expires: 1980-03-31
Abstract
No abstract record available.
Inventors
- 👤 William E Erner
- 👤 Harold A Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:26
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/54; C07D233/56; C07D233/64; Y; Y10; Y10S; Y10S8/00; Y10S8/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
THE METHOD OF PREPARING 2-OLEFINIC IMIDAZOLE WHICH INCLUDES THE STEPS OF: HEATING
Claim 2
Independent Claim
12 words
THE METHOD OF PREPARING 2-OLEFINIC IMIDAZOLE WHICH INCLUDES THE STEPS OF: HEATING
References Cited (Backward Citations)
DE248885C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |