Patent US2704189A successfully refreshed from Google Patents.
US2704189A
Expired / Lapsed
US
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Stone disc grinding mills, with unitary material impeller secured to runner stone
Assignee: MATT MACEK JR
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Filing: 1952-06-12
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Granted: 1955-03-15
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Expires: 1972-06-12
Abstract
No abstract record available.
Inventors
- 👤 Sr Matt Macek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:40
CPC Classifications
B; B02; B02C; B02C7/00; B02C7/02; B02C7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE20045C
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US109046A
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US603064A
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US2330067A
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US727156A
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US765281A
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AT35838B
Cited
US1153918A
Cited
US1488235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-14 | 1958-09-13 | 1959-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-14 | 1962-09-13 | 1963-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-14 | 1966-09-13 | 1967-03-15 | $7700.00 | Window Closed / Lapsed |