Patent US3414220A successfully refreshed from Google Patents.
US3414220A
Expired / Lapsed
US
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Clamp means
Assignee: Hydro Craft Inc
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Filing: 1966-12-30
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Granted: 1968-12-03
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Expires: 1986-12-30
Abstract
No abstract record available.
Inventors
- 👤 William R Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:45
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/02; F16L55/033; F16L55/035; F16L3/00; F16L3/22; F16L3/223; F16L3/2235
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) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |