US3275978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seismic signal processing by equalization of frequency components of a seismic signal
Assignee: ExxonMobil Upstream Research Co
•
Filing: 1963-03-01
•
Granted: 1966-09-27
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Expires: 1983-03-01
Abstract
No abstract record available.
Inventors
- 👤 John L Shanks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:44
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/28; G01V2210/00; G01V2210/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
AN APPARATUS FOR PROCESSING A SEISMIC SIGNAL WHICH COMPRISES IN COMBINATION: A SET OF A PLURALITY OF PARALLEL SHARPLY-TUNED BAND PASS FILTER SECTIONS WITH EACH FILTER SECTION BEING TUNED FOR A DIFFERENT FREQUENCY; RECTIFIER MEANS CONNECTED TO THE OUTPUT OF EACH SUCH FILTER SECTION; A CONSTANT CURRENT SOURCE CONNECTED TO THE OUTPUT OF EACH SAID FILTER SECTION AND PARALLEL WITH SAID RECTIFIER MEANS; A CHEMICAL INTEGRATOR FOR EACH FILTER SECTION, SAID CHEMICAL INTEGRATOR HAVING A CONTROL ELEMENT AND A SUBSTRATE RESISTANCE; SWITCHING MEANS WHEN IN ONE POSITION TO CONNECT THE SUBSTRATE RESISTANCE TO SAID CONSTANT CURRENT SOURCE AND TO DISCONNECT THE CONTROL ELEMENT FROM THE RECTIFIER MEANS AND WHEN IN A SECOND POSITION TO DISCONNECT THE SUBSTRATE RESISTANCE FROM THE CONSTANT CURRENT SOURCE AND TO CONNECT THE CONTROL ELEMENT TO THE RECTIFIER MEANS.
Claim 2
Independent Claim
133 words
AN APPARATUS FOR PROCESSING A SEISMIC SIGNAL WHICH COMPRISES IN COMBINATION: A SET OF A PLURALITY OF PARALLEL SHARPLY-TUNED BAND PASS FILTER SECTIONS WITH EACH FILTER SECTION BEING TUNED FOR A DIFFERENT FREQUENCY; RECTIFIER MEANS CONNECTED TO THE OUTPUT OF EACH SUCH FILTER SECTION; A CONSTANT CURRENT SOURCE CONNECTED TO THE OUTPUT OF EACH SAID FILTER SECTION AND PARALLEL WITH SAID RECTIFIER MEANS; A CHEMICAL INTEGRATOR FOR EACH FILTER SECTION, SAID CHEMICAL INTEGRATOR HAVING A CONTROL ELEMENT AND A SUBSTRATE RESISTANCE; SWITCHING MEANS WHEN IN ONE POSITION TO CONNECT THE SUBSTRATE RESISTANCE TO SAID CONSTANT CURRENT SOURCE AND TO DISCONNECT THE CONTROL ELEMENT FROM THE RECTIFIER MEANS AND WHEN IN A SECOND POSITION TO DISCONNECT THE SUBSTRATE RESISTANCE FROM THE CONSTANT CURRENT SOURCE AND TO CONNECT THE CONTROL ELEMENT TO THE RECTIFIER MEANS.
References Cited (Backward Citations)
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Cited
US2791473A
Cited
US3017612A
Cited
US2890414A
Cited
US3142815A
Cited
US3167710A
Cited
US3172083A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |