US2889892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lock for the discharge of solids separated from gaseous media by means of cyclones
Assignee: Ruhrchemie AG
•
Filing: 1957-07-02
•
Granted: 1959-06-09
•
Expires: 1977-07-02
Abstract
No abstract record available.
Inventors
- 👤 Schaub Franz
- 👤 Drope Winfried
- 👤 Hoffmann Wilfried Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 15:58
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/10; B; B04; B04C; B04C5/00; B04C5/14; B04C5/15
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1033164A
Cited
US1906151A
Cited
US1922003A
Cited
DE904261C
Cited
US2708489A
Cited
AT177277B
Cited
US2792910A
Cited
US2760595A
Cited
US2804170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-08 | 1962-12-08 | 1963-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-08 | 1966-12-08 | 1967-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-08 | 1970-12-08 | 1971-06-09 | $7700.00 | Window Closed / Lapsed |