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Patent US2491047A successfully refreshed from Google Patents.
US2491047A
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Feed control for stone cutting machines
Assignee: Individual
•
Filing: 1947-06-07
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Granted: 1949-12-13
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Expires: 1967-06-07
Abstract
No abstract record available.
Inventors
- 👤 William H Hunt
- 👤 George L Ritchie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:19
CPC Classifications
B; B28; B28D; B28D1/00; B28D1/02; B28D1/04; B28D1/047; B23; B23D; B23D47/00; B23D47/04; B23D47/045; B23Q; B23Q5/00; B23Q5/22; B23Q5/26; B23Q5/266
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1261669A
Cited
US1976164A
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US2254046A
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US2308703A
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US2371085A
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US2354509A
Cited
US2382897A
Cited
US2431469A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |