Patent US2418832A successfully refreshed from Google Patents.
US2418832A
Expired / Lapsed
US
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Chemical process and compound therefrom
Assignee: EIDP Inc
•
Filing: 1942-06-17
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Granted: 1947-04-15
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Expires: 1962-06-17
Abstract
No abstract record available.
Inventors
- 👤 William E Hanford
- 👤 Harmon Jesse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:36
CPC Classifications
C; C07; C07C; C07C19/00; C07C19/01; C07C17/00; C07C17/26; C07C17/272; C07C17/278; C07C17/281; Y; Y10; Y10S; Y10S260/00; Y10S260/28
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) | 1950-04-14 | 1950-10-14 | 1951-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-14 | 1954-10-14 | 1955-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-14 | 1958-10-14 | 1959-04-15 | $7700.00 | Window Closed / Lapsed |