US3481319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary truing device for grinding wheels
Assignee: DPBG Corp A CORP OF DELAWARE
•
Filing: 1966-11-15
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Granted: 1969-12-02
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Expires: 1986-11-15
Abstract
No abstract record available.
Inventors
- 👤 Walter A Boyd Jr
- 👤 Hugo A Lakso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:00
CPC Classifications
B; B24; B24B; B24B53/00; B24B53/04; B24B53/053; B24B53/06; B24B53/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US553225A
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US1708575A
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US1394704A
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US1537025A
Cited
GB161073A
Cited
US1395394A
Cited
US1562941A
Cited
US1496922A
Cited
FR670045A
Cited
CH174402A
Cited
US3121423A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-01 | 1973-06-02 | 1973-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-01 | 1977-06-02 | 1977-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-01 | 1981-06-02 | 1981-12-02 | $7700.00 | Window Closed / Lapsed |