Patent US3406537A successfully refreshed from Google Patents.
US3406537A
Expired / Lapsed
US
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Shock absorbing subassembly
Assignee: SCHAFFER TOOL WORKS
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Filing: 1966-02-21
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Granted: 1968-10-22
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Expires: 1986-02-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Chester B Falkner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:53
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2025100A
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US2463316A
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US2755079A
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US2756022A
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US2869858A
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US2991635A
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US3254508A
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US3225566A
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US3301009A
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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) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |