US3302745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Generation and reception of low frequency seismic waves
Assignee: Individual
•
Filing: 1964-02-06
•
Granted: 1967-02-07
•
Expires: 1984-02-06
Abstract
No abstract record available.
Inventors
- 👤 Ikrath Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:33
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
63 words
A METHOD OF DETECTING SUBSONIC FREQUENCY SEISMIC WAVES COMPRISING THE STEPS OF BIASING A PORTION OF THE EARTH INTO THE NON-LINEAR STRESS-STRAIN REGION, APPLYING A LOCALLY GENERATED SEISMIC WAVE OF SONIC FREQUENCY TO SAID PORTION OF THE EARTH, AND DETECTING ONE OF THE MODULATION PRODUCTS RESULTING FROM THE HETERODYNING WITHIN THE EARTH OF SAID SUBSONIC FREQUENCY WAVE AND SAID LOCALLY GENERATED SEISMIC WAVE.
References Cited (Backward Citations)
US2018463A
Cited
US2235089A
Cited
US2418156A
Cited
US3146446A
Cited
US3221297A
Cited
US3252129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |