US3393477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for grinding drills
Assignee: Individual
•
Filing: 1965-06-14
•
Granted: 1968-07-23
•
Expires: 1985-06-14
Abstract
No abstract record available.
Inventors
- 👤 Ahlstrom Allan Eugen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:10
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/24; B24B3/26; B24B3/265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2017532A
Cited
US2177644A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |