Patent US2200795A successfully refreshed from Google Patents.
US2200795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visible filtering apparatus
Assignee: Individual
•
Filing: 1938-08-19
•
Granted: 1940-05-14
•
Expires: 1958-08-19
Abstract
No abstract record available.
Inventors
- 👤 James H Krieck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:52
CPC Classifications
B; B01; B01D; B01D36/00; B01D36/003; B01D36/005; B01D29/00; B01D29/01; B01D29/05; B01D29/07; B01D29/072; B01D29/88; B01D29/90; B01D29/902; B01D35/00; B01D35/14; B01D35/153; B01D2201/00; B01D2201/30; B01D2201/309
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1943-05-14 | 1943-11-13 | 1944-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-05-14 | 1947-11-13 | 1948-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-05-14 | 1951-11-13 | 1952-05-14 | $7700.00 | Window Closed / Lapsed |