Patent US3520182A successfully refreshed from Google Patents.
US3520182A
Expired / Lapsed
US
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Load cells
Assignee: GEORGE KELK Ltd
•
Filing: 1967-06-05
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Granted: 1970-07-14
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Expires: 1987-06-05
Abstract
No abstract record available.
Inventors
- 👤 George F Kelk
- 👤 Andrejs Zeltkalns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:00
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/20; G01L1/22; G01L1/2206; G01L1/2231; G01L5/00; G01L5/0061; G01L5/0076
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB790057A
Cited
US2796503A
Cited
US3132547A
Cited
US3277704A
Cited
US3389432A
Cited
US3422671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |