US2564648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydantoin manufacture
Assignee: EIDP Inc
•
Filing: 1947-03-11
•
Granted: 1951-08-14
•
Expires: 1967-03-11
Abstract
No abstract record available.
Inventors
- 👤 Arthur O Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:25
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/54; C07D233/66; C07D233/72; C07D233/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
PROCESS FOR THE PRODUCTION OF A 5-(DELTAHALOBUTYL) HYDANTOIN WHICH COMPRISES REACTING, AS THE SOLE REACTANTS, 5-(DELTA-HYDROXYBUTYL) HYDANTOIN WITH A MATERIAL FROM THE GROUP CONSISTING OF HYDROGEN CHLORIDE AND HYDROGEN BROMIDE AT A TEMPERATURE BETWEEN 75* C. AND 200* C.
Claim 2
Dependent Claim
39 words
PROCESS FOR THE PRODUCTION OF A 5-(DELTAHALOBUTYL) HYDANTOIN WHICH COMPRISES REACTING, AS THE SOLE REACTANTS, 5-(DELTA-HYDROXYBUTYL) HYDANTOIN WITH A MATERIAL FROM THE GROUP CONSISTING OF HYDROGEN CHLORIDE AND HYDROGEN BROMIDE AT A TEMPERATURE BETWEEN 75* C. AND 200* C.
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) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |