US2650247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-allyl-and n-butenyl-hydrantoic acid
Assignee: E Fougera & Co Inc
•
Filing: 1951-12-28
•
Granted: 1953-08-25
•
Expires: 1971-12-28
Abstract
No abstract record available.
Inventors
- 👤 Halpern Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:19
CPC Classifications
C; C07; C07C; C07C275/00; C07C275/04; C07C275/20; C07F; C07F3/00; C07F3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A NEW COMPOUND OF THE GENERAL FORMULA
Claim 2
Dependent Claim
7 words
A NEW COMPOUND OF THE GENERAL FORMULA
References Cited (Backward Citations)
US2572568A
Cited
US2592418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |