US2728895A
Expired / Lapsed
US
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Self-locking coupling device
Assignee: Whitney Blake Co
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Filing: 1954-10-04
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Granted: 1955-12-27
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Expires: 1974-10-04
Abstract
No abstract record available.
Inventors
- 👤 Quackenbush Edward Clarke
- 👤 Frank E Runge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:03
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/62; H01R13/621; F; F16; F16L; F16L19/00; F16L19/005; F16L37/00; F16L37/08; F16L37/12; F16L37/1215; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/974; Y10S411/984; Y10T; Y10T403/00; Y10T403/59; Y10T403/599; Y10T403/70; Y10T403/7045
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) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |