US2347394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical apparatus
Assignee: EIDP Inc
•
Filing: 1941-10-31
•
Granted: 1944-04-25
•
Expires: 1961-10-31
Abstract
No abstract record available.
Inventors
- 👤 John J Bradley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:40
CPC Classifications
F; F28; F28F; F28F5/00; F28F5/02; C; C01; C01B; C01B17/00; C01B17/22; C01B17/24; C01B17/26; Y; Y10; Y10S; Y10S165/00; Y10S165/135; Y10S165/139; Y10S165/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1947-04-25 | 1947-10-25 | 1948-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-04-25 | 1951-10-25 | 1952-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-04-25 | 1955-10-25 | 1956-04-25 | $7700.00 | Window Closed / Lapsed |