US2742801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boring machine
Assignee: Librascope Inc
•
Filing: 1952-10-28
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Granted: 1956-04-24
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Expires: 1972-10-28
Abstract
No abstract record available.
Inventors
- 👤 Willard J Opocensky
- 👤 Buseth Harlan
- 👤 Charles R Cole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:05
CPC Classifications
B; B23; B23B; B23B29/00; B23B29/03; B23B29/034; B23B29/03403; B23B29/03428; B23Q; B23Q35/00; B23Q35/02; Y; Y10; Y10T; Y10T408/00; Y10T408/08; Y10T408/55; Y10T408/561; Y10T408/5617; Y10T408/5626
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) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |