Patent US2793756A successfully refreshed from Google Patents.
US2793756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering apparatus
Assignee: Bayer AG
•
Filing: 1952-02-05
•
Granted: 1957-05-28
•
Expires: 1972-02-05
Abstract
No abstract record available.
Inventors
- 👤 Haltmeier Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:36
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/15; B01D33/17; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/62; B01D29/70; B01D29/74; B01D33/27; B01D33/44; B01D33/52; B01D33/54; B01D33/56; B01D35/00; B01D35/10; B01D35/20; B01D2201/00; B01D2201/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1960-05-27 | 1960-11-26 | 1961-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-27 | 1964-11-26 | 1965-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-27 | 1968-11-26 | 1969-05-28 | $7700.00 | Window Closed / Lapsed |