Patent US2673388A successfully refreshed from Google Patents.
US2673388A
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US
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Means for preventing draw back marks
Assignee: New Britain Machine Co
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Filing: 1948-07-07
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Granted: 1954-03-30
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Expires: 1968-07-07
Abstract
No abstract record available.
Inventors
- 👤 William B Retz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:08
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/64; B23Q1/68; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5152; Y10T29/5165; Y10T74/00; Y10T74/14; Y10T74/1418; Y10T74/1424
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US635853A
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US1511447A
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US1794390A
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US2002933A
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US2506515A
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US2453120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-29 | 1957-09-28 | 1958-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-29 | 1961-09-28 | 1962-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-29 | 1965-09-28 | 1966-03-30 | $7700.00 | Window Closed / Lapsed |