Patent US2981928A successfully refreshed from Google Patents.
US2981928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for eliminating undesired components of composite received signals
Assignee: ConocoPhillips Co
•
Filing: 1954-10-20
•
Granted: 1961-04-25
•
Expires: 1974-10-20
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
2026-10-23 14:52
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2275735A
Cited
US2580636A
Cited
US2473469A
Cited
US2586731A
Cited
US2657373A
Cited
US2634398A
Cited
US2696891A
Cited
US2676206A
Cited
US2688124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |