US3427759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prestressed grinding wheel
Assignee: STERLING ABRASIVE PRODUCTS Co A CORP OF
•
Filing: 1965-08-25
•
Granted: 1969-02-18
•
Expires: 1985-08-25
Abstract
No abstract record available.
Inventors
- 👤 Samuel S Kistler
- 👤 Charles V Rue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:32
CPC Classifications
B; B24; B24D; B24D18/00; B24D18/0081; B24D5/00; B24D5/02; B24D5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US228257A
Cited
US3123948A
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US642828A
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US699302A
Cited
US1334881A
Cited
US2859936A
Cited
US2826016A
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US3222835A
Cited
US3141271A
Cited
US3208838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |