US2497839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-alkyl-2,5-dimethylpyrrolidines
Assignee: Armour and Co
•
Filing: 1944-03-16
•
Granted: 1950-02-14
•
Expires: 1964-03-16
Abstract
No abstract record available.
Inventors
- 👤 Anderson W Ralston
- 👤 Harwood James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:34
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/02; C07D295/027; C07D295/03; B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/01; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A COMPOUND OF THE GROUP CONSISTING OF 1-ALIPHATIC-2,5-DIMETHYLPYRROLIDINES OF THE GENERAL FORMULA
Claim 2
Dependent Claim
12 words
A COMPOUND OF THE GROUP CONSISTING OF 1-ALIPHATIC-2,5-DIMETHYLPYRROLIDINES OF THE GENERAL FORMULA
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) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |