Deep submergence hydrophone
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Jan 28, 1992
Grant Date -
N/A
app pub date -
Feb 16, 1988
filing date -
Feb 16, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A hydrophone with crossed pairs of geophones is provided with a strong light weight housing allowing use at several thousand feet deep in the ocean while still maintaining good sensitivity. The cruciform housing has a cylindrical portion conforming to each of the four geophones so that each cylindrical wall has small diameter and requires small thickness. The cylindrical portions are joined to a central body to complete the housing.
First Claim
all claims..Other Claims data not available
Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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SPARTON CORPORATION | 2400 E GANSON STREET JACKSON MI 49202 |
International Classification(s)

- 1988 Application Filing Year
- G10K Class
- 45 Applications Filed
- 0 Patents Issued To-Date
- 0 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Smith, Jr Daniel P | East Lansing, MI | 1 | 1 |
# of filed Patents : 1 Total Citations : 1 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 1 Citation Count
- G10K Class
- 0 % this patent is cited more than
- 33 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text

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Apr 09, 2021 | MAFP | MAINTENANCE FEE PAYMENT | free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY year of fee payment: 8 |
Sep 10, 2019 | I | Issuance | |
Nov 25, 2015 | F | Filing | |
May 07, 2009 | PD | Priority Date |

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