US3433832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of alpha-aminocarboxylic acids from sodium chloride solutions
Assignee: Dow Chemical Co
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Filing: 1965-12-03
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Granted: 1969-03-18
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Expires: 1985-12-03
Abstract
No abstract record available.
Inventors
- 👤 Norman Swanson
- 👤 Richard O Kirk
- 👤 George E Woodward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:27
CPC Classifications
C; C07; C07C; C07C227/00; C07C227/38; C07C227/40; C07C319/00; C07C319/26; C07C319/28; C07C323/00; C07C323/50; C07C323/51; C07C323/57; C07C323/58
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) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |