US2618182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knurling tool for internal cylindrical surfaces
Assignee: Perfect Circle Corp
•
Filing: 1947-09-27
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Granted: 1952-11-18
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Expires: 1967-09-27
Abstract
No abstract record available.
Inventors
- 👤 Ralph R Teetor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:32
CPC Classifications
B; B21; B21H; B21H7/00; B21H7/14; Y; Y10; Y10S; Y10S29/00; Y10S29/023; Y10S72/00; Y10S72/703; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49249; Y10T29/4925; Y10T29/4927; Y10T29/49826; Y10T29/49908; Y10T29/49938; Y10T29/4994
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US405226A
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US911172A
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US964272A
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US1837624A
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US2155542A
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US2409219A
Cited
GB555237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |