Patent US2516635A successfully refreshed from Google Patents.
US2516635A
Expired / Lapsed
US
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Bromoethyl hydantoin and method of making same
Assignee: Dow Chemical Co
•
Filing: 1946-11-07
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Granted: 1950-07-25
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Expires: 1966-11-07
Abstract
No abstract record available.
Inventors
- 👤 John E Livak
- 👤 Edgar C Britton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:53
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/54; C07D233/66; C07D233/72; C07D233/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
5-(BETA-BROMOETHYL) HYDANTOIN, A CRYSTALLINE COMPOUND HAVING A MELTING POINT OF APPROXIMATELY 141*-143*C.
Claim 2
Dependent Claim
12 words
5-(BETA-BROMOETHYL) HYDANTOIN, A CRYSTALLINE COMPOUND HAVING A MELTING POINT OF APPROXIMATELY 141*-143*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) | 1953-07-24 | 1954-01-23 | 1954-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-24 | 1958-01-23 | 1958-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-24 | 1962-01-23 | 1962-07-25 | $7700.00 | Window Closed / Lapsed |