Patent US3521484A successfully refreshed from Google Patents.
US3521484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Load measuring system
Assignee: ELECTRO DEV CORP
•
Filing: 1967-12-15
•
Granted: 1970-07-21
•
Expires: 1987-12-15
Abstract
No abstract record available.
Inventors
- 👤 Richard L Dybvad
- 👤 Philip J Johansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:57
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/20; G01L1/22; G01L1/2206; G01L1/2218; G01L1/2225; G01G; G01G19/00; G01G19/02; G01G19/07; G01G19/08; G01G19/12; G01G3/00; G01G3/12; G01G3/14; G01G3/1402; G01G3/1404; G01G3/1408; G01L5/00; G01L5/0004
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2544738A
Cited
US3034347A
Cited
US3168826A
Cited
US3184188A
Cited
US3212321A
Cited
US3273382A
Cited
US3327270A
Cited
US3426586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |