US2847417A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of imidazole compounds
Assignee: Houdry Process Corp
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Filing: 1956-07-13
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Granted: 1958-08-12
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Expires: 1976-07-13
Abstract
No abstract record available.
Inventors
- 👤 William E Erner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:30
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; B; B01; B01J; B01J27/00; B01J27/06; B01J27/128; B01J27/13; C07; C07D; C07D233/00; C07D233/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
THE METHOD WHICH COMPRISES ADMIXING AN ALKYLENE DIAMINE OF THE FORMULA 1
Claim 2
Independent Claim
12 words
THE METHOD WHICH COMPRISES ADMIXING AN ALKYLENE DIAMINE OF THE FORMULA 1
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) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |