US2429645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Art of esterification
Assignee: JOSEPH G DENNY JR
•
Filing: 1940-08-08
•
Granted: 1947-10-28
•
Expires: 1960-08-08
Abstract
No abstract record available.
Inventors
- 👤 Pratt Annette Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:06
CPC Classifications
C; C08; C08B; C08B3/00; C08B3/02; C08B37/00
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) | 1950-10-27 | 1951-04-28 | 1951-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-27 | 1955-04-28 | 1955-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-27 | 1959-04-28 | 1959-10-28 | $7700.00 | Window Closed / Lapsed |