Patent US3426904A successfully refreshed from Google Patents.
US3426904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separating apparatus for dispersed matter
Assignee: Mitsubishi Heavy Industries Ltd
•
Filing: 1965-12-21
•
Granted: 1969-02-11
•
Expires: 1985-12-21
Abstract
No abstract record available.
Inventors
- 👤 Kihei Katsuta
- 👤 Yoshikatsu Shimasaki
- 👤 Ikuo Miki
- 👤 Akira Imamura
- 👤 Hiroshi Oota
- 👤 Takeshi Matsubara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:13
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/0208; B01D17/0211
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB382711A
Cited
GB645710A
Cited
US2355875A
Cited
FR55765E
Cited
FR994118A
Cited
US2497392A
Cited
GB746980A
Cited
US3294504A
Cited
US3197336A
Cited
US3279902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |