US2455940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of geophysical exploration by microwaves
Assignee: Gulf Research and Development Co
•
Filing: 1944-11-28
•
Granted: 1948-12-14
•
Expires: 1964-11-28
Abstract
No abstract record available.
Inventors
- 👤 Muskat Morris
- 👤 Norman D Coggeshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:45
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1838371A
Cited
US2075808A
Cited
US2271951A
Cited
US2139460A
Cited
US2230502A
Cited
US2334475A
Cited
US2400678A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-14 | 1952-06-14 | 1952-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-14 | 1956-06-14 | 1956-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-14 | 1960-06-14 | 1960-12-14 | $7700.00 | Window Closed / Lapsed |