Patent US2647148A successfully refreshed from Google Patents.
US2647148A
Expired / Lapsed
US
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3, 4-dihydroxy-4'-halogeno chalcones
Assignee: National Drug Co
•
Filing: 1951-07-20
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Granted: 1953-07-28
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Expires: 1971-07-20
Abstract
No abstract record available.
Inventors
- 👤 Gustav J Martin
- 👤 Beiler Jay Morton
- 👤 Jack N Moss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:23
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/76; C07C49/82; C07C49/835; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/72; C07C45/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
2 words
3,4-DIHYDROXY-4''-HALOGENO CHALCONES,
Claim 2
Dependent Claim
2 words
3,4-DIHYDROXY-4''-HALOGENO CHALCONES,
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) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |