US2995699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Geophysical survey apparatus
Assignee: Mullard Radio Valve Co Ltd
•
Filing: 1956-02-29
•
Granted: 1961-08-08
•
Expires: 1976-02-29
Abstract
No abstract record available.
Inventors
- 👤 Snelling Eric Charles
- 👤 Gribble Peter Doidge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:20
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/15; G01V3/17
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
CA510909A
Cited
US2366621A
Cited
US2169685A
Cited
US2489920A
Cited
US2788483A
Cited
US2455792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-07 | 1965-02-06 | 1965-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-07 | 1969-02-06 | 1969-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-07 | 1973-02-06 | 1973-08-08 | $7700.00 | Window Closed / Lapsed |