US2928450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-contained perforating and countersinking unit
Assignee: WALES STRIPPIT CORP
•
Filing: 1955-02-07
•
Granted: 1960-03-15
•
Expires: 1975-02-07
Abstract
No abstract record available.
Inventors
- 👤 Francis M Belding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:17
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/02; B21D22/04; B21D28/00; B21D28/24; Y; Y10; Y10T; Y10T83/00; Y10T83/869; Y10T83/8719
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1726219A
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US1911108A
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US2134815A
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US2123393A
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US2122316A
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US2708288A
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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) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |