US2225294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning process
Assignee: EIDP Inc
•
Filing: 1938-02-05
•
Granted: 1940-12-17
•
Expires: 1958-02-05
Abstract
No abstract record available.
Inventors
- 👤 Elmer K Bolton
- 👤 James K Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:35
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/12; Y; Y10; Y10S; Y10S507/00; Y10S507/933
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) | 1943-12-17 | 1944-06-17 | 1944-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-17 | 1948-06-17 | 1948-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-17 | 1952-06-17 | 1952-12-17 | $7700.00 | Window Closed / Lapsed |