Patent US2758700A successfully refreshed from Google Patents.
US2758700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mineral filler feeder
Assignee: Cedarapids Inc
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Filing: 1954-01-13
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Granted: 1956-08-14
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Expires: 1974-01-13
Abstract
No abstract record available.
Inventors
- 👤 Robert F Plumb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:05
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/02; E01C19/10; E01C19/1059; E01C19/1068; E01C19/1072
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
IN A FEEDER FOR PULVERULENT MATERIALS SUCH AS MINERAL DUST, A CONVEYOR COMPRISING AN IMPERFORATE MEMBER EFFECTIVE FOR MOVING THE MATERIAL IN ONE DIRECTION, A DUST BIN OVERLYING SAID MEMBER OPEN THERETO AT ITS BOTTOM AND HAVING AN OUTLET OPENING AT ITS FRONT WALL, A PRIMARY ME-
Claim 2
Dependent Claim
47 words
IN A FEEDER FOR PULVERULENT MATERIALS SUCH AS MINERAL DUST, A CONVEYOR COMPRISING AN IMPERFORATE MEMBER EFFECTIVE FOR MOVING THE MATERIAL IN ONE DIRECTION, A DUST BIN OVERLYING SAID MEMBER OPEN THERETO AT ITS BOTTOM AND HAVING AN OUTLET OPENING AT ITS FRONT WALL, A PRIMARY ME-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |