Patent EP0385508A2 successfully refreshed from Google Patents.
US2804460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tropene derivatives
Assignee: Irwin Neisler and Co
•
Filing: 1955-07-15
•
Granted: 1957-08-27
•
Expires: 1975-07-15
Abstract
No abstract record available.
Inventors
- 👤 Chester J Cavallito
- 👤 Gray Allan Poe
- 👤 Archer Wesley Lea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:25
CPC Classifications
C; C07; C07D; C07D451/00; C07D451/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A COMPOUND HAVING THE FORMULA: WHEREIN N IS AN INTEGER FROM TWO TO FOUR, INCLUSIVE, R AND R1 REPRESENT LOWER-ALKYL RADICALS WHICH MAY BE JOINED TOGETHER TO FORM AN N-HETTEROCYCLIC GROUP, THE SUM OF THE CARBON ATOMS IN SAID RADICALS AND GROUP BEING FROM THREE TO SIX, INCLUSIVE, <A IS SELECTED FROM THE GROUP CONSISTING OF.
Claim 2
Dependent Claim
56 words
A COMPOUND HAVING THE FORMULA: WHEREIN N IS AN INTEGER FROM TWO TO FOUR, INCLUSIVE, R AND R1 REPRESENT LOWER-ALKYL RADICALS WHICH MAY BE JOINED TOGETHER TO FORM AN N-HETTEROCYCLIC GROUP, THE SUM OF THE CARBON ATOMS IN SAID RADICALS AND GROUP BEING FROM THREE TO SIX, INCLUSIVE, <A IS SELECTED FROM THE GROUP CONSISTING OF.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |