Patent US2548772A successfully refreshed from Google Patents.
US2548772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing cyanobutyl
Assignee: —
•
Filing: —
•
Granted: 1951-04-10
•
Expires: 1968-04-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:08
CPC Classifications
C; C07; C07D; C07D251/00; C07D251/02; C07D251/12; C07D251/26; C07D251/40; C07D251/48; C07D251/14; C07D251/16; C07D251/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
PROCESS OF PREPARING OMEGA-CYANOBUTYL GUANAMINE.
Claim 2
Dependent Claim
5 words
PROCESS OF PREPARING OMEGA-CYANOBUTYL GUANAMINE.
References Cited (Backward Citations)
US2394526A
Cited
US2302162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |