US2564647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydantoin manufacture
Assignee: EIDP Inc
•
Filing: 1947-03-05
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Granted: 1951-08-14
•
Expires: 1967-03-05
Abstract
No abstract record available.
Inventors
- 👤 Arthur O Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:40
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/54; C07D233/66; C07D233/72; C07D233/76; C07D233/78
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
PROCESS FOR THE PRODUCTION OF 5-(DELTA-HYDROXYBUTYL) HYDANTOIN WHICH COMPRISES REACTING IN AQUEOUS SOLUTION AT ELEVATED TEMPERATURES DELTA-HYDROXYVALERALDEHYDE, A COMPOUND YIELDING AMMONIUM IONS, A COMPOUND YIELDING CARBONATE IONS AND A COMPOUND YIELDING CYANIDE IONS. 17. 5-(DELTA-HYDROXYBUTYL) HYDANTOIN.
Claim 2
Dependent Claim
36 words
PROCESS FOR THE PRODUCTION OF 5-(DELTA-HYDROXYBUTYL) HYDANTOIN WHICH COMPRISES REACTING IN AQUEOUS SOLUTION AT ELEVATED TEMPERATURES DELTA-HYDROXYVALERALDEHYDE, A COMPOUND YIELDING AMMONIUM IONS, A COMPOUND YIELDING CARBONATE IONS AND A COMPOUND YIELDING CYANIDE IONS. 17. 5-(DELTA-HYDROXYBUTYL) HYDANTOIN.
References Cited (Backward Citations)
DE566094C
Cited
US2391799A
Cited
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 |