US2856157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Masonry drills
Assignee: NEW ENGLAND CARBIDE TOOL COMPA
•
Filing: 1955-09-19
•
Granted: 1958-10-14
•
Expires: 1975-09-19
Abstract
No abstract record available.
Inventors
- 👤 Bernard L Chapin
- 👤 Ralph H Alper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:43
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/04; B23B51/0461; B23B51/0002; B23B51/0003; B23B51/0004; B23B51/0006; B23B51/0007; B23B2226/00; B23B2226/75; B23B2251/00; B23B2251/02; B23B2251/40; B23B2251/408; B23B2251/50
Claims Analysis
Total Claims: 0
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US2673717A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |