US5136613A
Expired / Lapsed
US
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Spread Spectrum telemetry
Assignee: Individual
•
Filing: 1990-09-28
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Granted: 1992-08-04
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Expires: 2010-09-28
Abstract
Abstract Transponders in or with a shallow water seismic cable emit acoustic signals for acoustic ranging on command from a transceiver aboard a seismic exploration vessel. The acoustic ranging data together with navigational data cna be used to identify cable location. The transponders are activated by individual identifying digital codes. Each such digital code is a data word of suitable length composed of a distinctive frequency sent in bursts for a specific time for successive pairs of bits, or di-bits, in the data word. The time spacing between sending the frequency bursts is also used to carry other di-bits of the data word.
Inventors
- 👤 Alex C. Dumestre, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:14
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/74; H; H04; H04B; H04B11/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
55 words
A spread spectrum telemetry apparatus, comprising: a transceiver for transmitting and receiving signals; a plurality of addressable transponders in a seismic cable; means for forming a code of digital bits of a data word for transmission to the addressable transponders; said plurality of addressable transponders comprising means responsive to the code transmitted from said transceiver.
Claim 2
Dependent Claim
55 words
A spread spectrum telemetry apparatus, comprising: a transceiver for transmitting and receiving signals; a plurality of addressable transponders in a seismic cable; means for forming a code of digital bits of a data word for transmission to the addressable transponders; said plurality of addressable transponders comprising means responsive to the code transmitted from said transceiver.
Claim 3
Dependent Claim
30 words
The apparatus of claim 1, wherein said transceiver comprises: means for forming the code of digital bits of the data word composed of a distinctive frequency burst for such bits.
Claim 4
Dependent Claim
36 words
The apparatus of claim 1, wherein said transceiver comprises: means for forming the code as successive pairs of digital bits of the data word composed of a distinctive frequency burst for each such pair of bits.
Claim 5
Dependent Claim
33 words
The apparatus of claim 2, wherein said transceiver comprises: means for forming the code of digital bits of the data word composed of a distinctive frequency burst at discrete times for such bits.
Claim 6
Dependent Claim
32 words
The apparatus of claim 4, wherein said transceiver comprises: means for forming the code of digital bits of the data word composed of a distinctive time spacing between such discrete frequency bursts.
Claim 7
Dependent Claim
33 words
The apparatus of claim 2, wherein said plurality of addressable transponders comprise: means responsive to the code of digital bits of the data word composed of a distinctive frequency burst for such bits.
Claim 8
Dependent Claim
39 words
The apparatus of claim 6, wherein said plurality of addressable transponders comprise: means for forming the code as successive pairs of digital bits of the data word composed of a distinctive frequency burst for each such pair of bits.
Claim 9
Dependent Claim
37 words
The apparatus of claim 6, wherein said plurality of addressable transponders comprise: means for forming the code of digital bits of the data word composed of a distinctive frequency burst at a discrete time for such bits.
Claim 10
Dependent Claim
35 words
The apparatus of claim 6, wherein said plurality of addressable transponders comprise: means for forming the code of digital bits of the data word composed of a distinctive time spacing between such discrete frequency bursts.
Claim 11
Dependent Claim
67 words
A spread spectrum telemetry transmitter, for transmitting signals to a plurality of addressable transponders in a seismic cable, comprising: means for forming a code of digital bits of a data word composed of a distinctive frequency burst for such bits for transmission; and means for forming a code of further digital bits of the data word composed of a distinctive time spacing between such discrete frequency bursts.
Claim 12
Dependent Claim
67 words
A spread spectrum telemetry transmitter, for transmitting signals to a plurality of addressable transponders in a seismic cable, comprising: means for forming a code of digital bits of a data word composed of a distinctive frequency burst for such bits for transmission; and means for forming a code of further digital bits of the data word composed of a distinctive time spacing between such discrete frequency bursts.
Claim 13
Dependent Claim
36 words
The apparatus of claim 10, wherein said transmitter comprises: means for forming the code as successive pairs of digital bits of the data word composed of a distinctive frequency burst for each such pair of bits.
Claim 14
Dependent Claim
33 words
The apparatus of claim 11, wherein said transmitter comprises: means for forming a code of digital bits of the data word composed of a distinctive frequency burst at discrete times for such bits.
Claim 15
Dependent Claim
57 words
A spread spectrum telemetry transponder in a seismic cable, comprising: means responsive to a code of digital bits of a received data word composed of a distinct frequency burst for such bits; and means responsive to a code of digital bits of the received data word composed of a distinctive time spacing between the discrete frequency bursts.
Claim 16
Dependent Claim
57 words
A spread spectrum telemetry transponder in a seismic cable, comprising: means responsive to a code of digital bits of a received data word composed of a distinct frequency burst for such bits; and means responsive to a code of digital bits of the received data word composed of a distinctive time spacing between the discrete frequency bursts.
Claim 17
Dependent Claim
37 words
The apparatus of claim 13, wherein said transponder comprises: means for forming a code of successive pairs of digital bits of a data word for transmission composed of a distinctive frequency for each such pair of bits.
Claim 18
Dependent Claim
35 words
The apparatus of claim 13, wherein said transponder comprises: means for forming a code of digital bits of the data word for transmission composed of a distinctive frequency burst at discrete times for such bits.
Claim 19
Dependent Claim
37 words
The apparatus of claim 13, wherein said plurality of addressable transponders comprise: means for forming a code of digital bits of the data word for transmission composed of a distinctive time spacing between such discrete frequency bursts.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-04 | 1996-02-03 | 1996-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-04 | 2000-02-03 | 2000-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-04 | 2004-02-03 | 2004-08-04 | $7700.00 | Window Closed / Lapsed |