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Patent US2423113A successfully refreshed from Google Patents.
US2423113A
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Apparatus for making precision-bore tubes
Assignee: Fischer and Porter Co
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Filing: 1944-02-05
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Granted: 1947-07-01
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Expires: 1964-02-05
Abstract
No abstract record available.
Inventors
- 👤 George W Pfleghar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:35
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/04; C03B23/07; C03B23/073; C03B23/076
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US786259A
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US1301714A
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FR488710A
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US1446026A
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US1676795A
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US1912405A
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US2286401A
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US2272105A
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US2323182A
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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) | 1950-06-30 | 1950-12-30 | 1951-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-30 | 1954-12-30 | 1955-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-30 | 1958-12-30 | 1959-07-01 | $7700.00 | Window Closed / Lapsed |