US2568863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sectional perforating die
Assignee: Individual
•
Filing: 1948-04-08
•
Granted: 1951-09-25
•
Expires: 1968-04-08
Abstract
No abstract record available.
Inventors
- 👤 May Bertram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:30
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/24; B21D28/34; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2092; Y10T83/2096; Y10T83/217; Y10T83/2172; Y10T83/869; Y10T83/8821; Y10T83/8828; Y10T83/8841; Y10T83/8844; Y10T83/929; Y10T83/9411; Y10T83/9423; Y10T83/944
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US509134A
Cited
US655752A
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US1205257A
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US1152886A
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US1128450A
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US2102292A
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US2335552A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |