US2660341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the pneumatic evacuation of materials
Assignee: Finnie & Norbom
•
Filing: 1950-05-03
•
Granted: 1953-11-24
•
Expires: 1970-05-03
Abstract
No abstract record available.
Inventors
- 👤 Ragnar A Norbom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:29
CPC Classifications
B; B61; B61D; B61D7/00; B61D7/14; B61D7/32; B60; B60P; B60P1/00; B60P1/60
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB189401904A
Cited
US734631A
Cited
US949400A
Cited
US1157132A
Cited
US2044326A
Cited
US2148946A
Cited
FR848151A
Cited
US2240205A
Cited
US2322171A
Cited
US2464183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |