Patent US2928873A successfully refreshed from Google Patents.
US2928873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain monoamides of hydantoic acid
Assignee: US Vitamin and Pharmaceutical Corp
•
Filing: 1959-01-07
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Granted: 1960-03-15
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Expires: 1979-01-07
Abstract
No abstract record available.
Inventors
- 👤 Seymour L Shapiro
- 👤 Freedman Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:17
CPC Classifications
C; C07; C07C; C07C275/00; C07C275/04; C07C275/06; C07C275/16
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
2 words
THE COMPOUND
Claim 2
Dependent Claim
2 words
THE COMPOUND
Claim 3
Dependent Claim
9 words
THE COMPOUND OF CLAIM 1 WHEREIN R IS PHENYL.
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) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |