US2416309A
Expired / Lapsed
US
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Alkylamine salts of dinitrophenols
Assignee: Dow Chemical Co
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Filing: 1941-08-29
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Granted: 1947-02-25
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Expires: 1961-08-29
Abstract
No abstract record available.
Inventors
- 👤 John N Hansen
- 👤 Frank B Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:44
CPC Classifications
C; C07; C07C; C07C205/00; C07C205/13; C07C205/20; C07C205/21; C07C205/23; A; A01; A01N; A01N33/00; A01N33/16; A01N33/18; A01N33/20; A01N33/22; C07C209/00; C07C209/68; C07C211/00; C07C211/01; C07C211/02; C07C211/03; C07C211/07; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-24 | 1950-08-26 | 1951-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-24 | 1954-08-26 | 1955-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-24 | 1958-08-26 | 1959-02-25 | $7700.00 | Window Closed / Lapsed |