US2640378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boring head construction
Assignee: Individual
•
Filing: 1951-04-06
•
Granted: 1953-06-02
•
Expires: 1971-04-06
Abstract
No abstract record available.
Inventors
- 👤 Robert W Haggar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:03
CPC Classifications
B; B23; B23B; B23B29/00; B23B29/03; B23B29/034; B23B29/03403; B23B29/03407; Y; Y10; Y10T; Y10T279/00; Y10T279/14; Y10T408/00; Y10T408/44; Y10T408/45; Y10T408/89; Y10T408/907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |