US3170953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-hydroxymaleamic acid
Assignee: Dow Chemical Co
•
Filing: 1960-09-06
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Granted: 1965-02-23
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Expires: 1980-09-06
Abstract
No abstract record available.
Inventors
- 👤 Sherman C Lashua
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:21
CPC Classifications
C; C07; C07C; C07C239/00; C07C239/08; C07C239/14; C07C231/00; C07C231/02
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) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |