US2973740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for spraying loose bulk material
Assignee: Bemis Brothers Bag Co
•
Filing: 1957-12-26
•
Granted: 1961-03-07
•
Expires: 1977-12-26
Abstract
No abstract record available.
Inventors
- 👤 Frank L Hopkins
- 👤 Jack D Helm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:31
CPC Classifications
B; B65; B65G; B65G69/00; B65G69/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US74469A
Cited
US949360A
Cited
US1027321A
Cited
US1491915A
Cited
DE419531C
Cited
US1807230A
Cited
US2071846A
Cited
US2207758A
Cited
US2638381A
Cited
US2689018A
Cited
US2808858A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |