Patent US2718252A successfully refreshed from Google Patents.
US2718252A
Expired / Lapsed
US
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Screw or bolt with spring spline
Assignee: Individual
•
Filing: 1953-06-12
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Granted: 1955-09-20
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Expires: 1973-06-12
Abstract
No abstract record available.
Inventors
- 👤 Isidoro V Schuster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:20
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/02; F16B39/04; F16B39/06; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/945; Y10S411/946; Y10S411/948
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB487517A
Cited
US2318356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-19 | 1959-03-21 | 1959-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-19 | 1963-03-21 | 1963-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-19 | 1967-03-21 | 1967-09-20 | $7700.00 | Window Closed / Lapsed |