US2429445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for reaction products of primary and secondary alkylolamines
Assignee: IND PATENT CORP
•
Filing: 1943-09-29
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Granted: 1947-10-21
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Expires: 1963-09-29
Abstract
No abstract record available.
Inventors
- 👤 Harland H Young
- 👤 Rubinstein David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:41
CPC Classifications
C; C11; C11D; C11D9/00; C11D9/002; C11D10/00; C11D10/04; C11D10/047; C11D1/00; C11D1/38; C11D1/46; C11D1/52; C11D1/523; C11D1/528
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-20 | 1951-04-21 | 1951-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-20 | 1955-04-21 | 1955-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-20 | 1959-04-21 | 1959-10-21 | $7700.00 | Window Closed / Lapsed |