Patent US4550371A successfully refreshed from Google Patents.
Patent US2811960A successfully refreshed from Google Patents.
US2811960A
Expired / Lapsed
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Abrasive cutting body
Assignee: Individual
•
Filing: 1957-02-26
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Granted: 1957-11-05
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Expires: 1977-02-26
Abstract
No abstract record available.
Inventors
- 👤 Fessel Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:15
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/48; B; B24; B24D; B24D5/00; B24D5/12; B28; B28D; B28D1/00; B28D1/02; B28D1/04; B28D1/041; B28D1/12; B28D1/121; B28D1/127; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/932; Y10T; Y10T408/00; Y10T408/81; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12139; Y10T428/12201
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
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US927164A
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US2032395A
Cited
FR829289A
Cited
US2270209A
Cited
US2508042A
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Cited
US2746217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |