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Patent US2672772A successfully refreshed from Google Patents.
US2672772A
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Boring machine for cylindrical electrotypes
Assignee: Electrographic Corp
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Filing: 1950-09-20
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Granted: 1954-03-23
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Expires: 1970-09-20
Abstract
No abstract record available.
Inventors
- 👤 George W Bungay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:18
CPC Classifications
B; B25; B25B; B25B5/00; B25B5/06; B23; B23B; B23B41/00; B23B41/12; B23Q; B23Q1/00; B23Q1/25; B23Q1/44; B23Q1/50; B23Q1/52; B23Q1/525; B25B1/00; B25B1/06; B25B1/10; B25B1/12; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/30868; Y10T409/309016
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) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |