Patent US5290305A successfully refreshed from Google Patents.
Patent US2460869A successfully refreshed from Google Patents.
Patent US2989726A successfully refreshed from Google Patents.
US2989726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for determining the travel time of a vibratory signal between spaced points
Assignee: ConocoPhillips Co
•
Filing: 1954-04-28
•
Granted: 1961-06-20
•
Expires: 1974-04-28
Abstract
No abstract record available.
Inventors
- 👤 John M Crawford
- 👤 William E N Doty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:50
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/003; G01V1/005; G04; G04F; G04F10/00; G06; G06G; G06G7/00; G06G7/12; G06G7/19; G06G7/1914; G06K; G06K11/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2732025A
Cited
US2594767A
Cited
US2638402A
Cited
US2672944A
Cited
US2658579A
Cited
US2671375A
Cited
US2696891A
Cited
US2676206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |