US2643554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boring bar pilot support
Assignee: Gisholt Machine Co
•
Filing: 1948-01-14
•
Granted: 1953-06-30
•
Expires: 1968-01-14
Abstract
No abstract record available.
Inventors
- 👤 Sperisen Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:43
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/70; B23B; B23B29/00; B23B29/02; B23B29/027; Y; Y10; Y10T; Y10T408/00; Y10T408/96; Y10T82/00; Y10T82/25; Y10T82/2572
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE306295C
Cited
US1056282A
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US1099500A
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US1846986A
Cited
US1906715A
Cited
US2295856A
Cited
US2383094A
Cited
US2429516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |