US3459928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Correlation of variables not previously known
Assignee: Seismograph Service Corp
•
Filing: 1964-09-15
•
Granted: 1969-08-05
•
Expires: 1984-09-15
Abstract
No abstract record available.
Inventors
- 👤 William Edward Lerwill
- 👤 Nigel Allister Anstey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:05
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/19; G06G7/1914
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3260980A
Cited
US3041414A
Cited
GB893449A
Cited
US3319173A
Cited
US3310665A
Cited
US3345504A
Cited
US3297981A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |