US3478406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screening separator
Assignee: Sweco Inc
•
Filing: 1967-04-28
•
Granted: 1969-11-18
•
Expires: 1987-04-28
Abstract
No abstract record available.
Inventors
- 👤 Wayne James Auckland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:32
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/28; B07B1/38
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US142729A
Cited
US507971A
Cited
US1028867A
Cited
US1120012A
Cited
US1152650A
Cited
US1576616A
Cited
FR779008A
Cited
DE612987C
Cited
US2212818A
Cited
DE1000666B
Cited
DE1192035B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |