US3243520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recordation of data
Assignee: ExxonMobil Upstream Research Co
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Filing: 1961-10-02
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Granted: 1966-03-29
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Expires: 1981-10-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Sidney A Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:17
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
THE METHOD OF STORING AND REPRODUCING A VARIABLE AMPLITUDE ELECTRICAL SIGNAL ON MAGETIC TAPE COMPRISING: ADDING TO THE VARIABLE AMPLITUDE SIGNAL A CONSTANT AMPLITUDE, CONSTANT FREQUENCY REFERENCE SIGNAL HAVING A FREQUENCY SUBSTANTIALLY GREATER THAN THE MAXIMUM FREQUENCY COMPONENT OF SAID VARIABLE AMPLITUDE SIGNAL, TO PRODUCE A COMBINED SIGNAL; RECORDING THE COMBINED SIGNAL ON THE MAGNETIC MEDIUM TO PRODUCE A RECORD TRACE; PRODUCING A SECONDARY ELECTRICAL SIGNAL FROM SAID RECORD TRACE PUTATIVELY IDENTICAL TO SAID COMBINED SIGNAL; SEPARATING THE COMPONENTS OF SAID SECONDARY SIGNAL HAVING THE FREQUENCY OF THE REFERENCE SIGNAL FROM THE COMPONENTS OF SAID SECONDARY SIGNAL HAVING A FREQUENCY COMPONENTS OF SAID VARIABLE AMPLITUDE ELECTRICAL SIGNAL; ELECTRICALLY AMPLIFYING SAID COMPONENTS OF SAID SECONDARY SIGNAL HAVING A FREQUENCY COMPONENTS OF SAID VARIABLE AMPLITUDE SIGNAL; AND VARYING THE AMPLIFICATION OF SAID COMPONENTS OF SAID SECONDARY SIGNAL HAVING THE FREQUENCY COMPONENTS OF SAID VARIABLE AMPLITUDE SIGNAL INVERSELY WITH SUBSTANTIALLY SIMULTANEOUS VARIATIONS IN THE AMPLITUDE OF THE COMPONENTS OF SAID SECONDARY SIGNAL HAVING THE FREQUENCY OF THE REFERENCE SIGNAL.
Claim 2
Independent Claim
166 words
THE METHOD OF STORING AND REPRODUCING A VARIABLE AMPLITUDE ELECTRICAL SIGNAL ON MAGETIC TAPE COMPRISING: ADDING TO THE VARIABLE AMPLITUDE SIGNAL A CONSTANT AMPLITUDE, CONSTANT FREQUENCY REFERENCE SIGNAL HAVING A FREQUENCY SUBSTANTIALLY GREATER THAN THE MAXIMUM FREQUENCY COMPONENT OF SAID VARIABLE AMPLITUDE SIGNAL, TO PRODUCE A COMBINED SIGNAL; RECORDING THE COMBINED SIGNAL ON THE MAGNETIC MEDIUM TO PRODUCE A RECORD TRACE; PRODUCING A SECONDARY ELECTRICAL SIGNAL FROM SAID RECORD TRACE PUTATIVELY IDENTICAL TO SAID COMBINED SIGNAL; SEPARATING THE COMPONENTS OF SAID SECONDARY SIGNAL HAVING THE FREQUENCY OF THE REFERENCE SIGNAL FROM THE COMPONENTS OF SAID SECONDARY SIGNAL HAVING A FREQUENCY COMPONENTS OF SAID VARIABLE AMPLITUDE ELECTRICAL SIGNAL; ELECTRICALLY AMPLIFYING SAID COMPONENTS OF SAID SECONDARY SIGNAL HAVING A FREQUENCY COMPONENTS OF SAID VARIABLE AMPLITUDE SIGNAL; AND VARYING THE AMPLIFICATION OF SAID COMPONENTS OF SAID SECONDARY SIGNAL HAVING THE FREQUENCY COMPONENTS OF SAID VARIABLE AMPLITUDE SIGNAL INVERSELY WITH SUBSTANTIALLY SIMULTANEOUS VARIATIONS IN THE AMPLITUDE OF THE COMPONENTS OF SAID SECONDARY SIGNAL HAVING THE FREQUENCY OF THE REFERENCE SIGNAL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |