Portable toilet
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Aug 23, 1988
Grant Date -
N/A
app pub date -
Sep 19, 1985
filing date -
Sep 19, 1985
priority date (Note) -
Expired
status (Latency Note)
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Importance

US Family Size
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Non-US Coverage
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Patent Longevity
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Forward Citations
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Abstract
A portable toilet of the type having a waste holding tank which is separable from a bowl unit of the toilet. The tank includes a vent for permitting entry of air to the holding tank during emptying thereof. This avoids surging of the contents of the tank during emptying, assuring a smooth flow of the liquid and minimizing splashing. In a preferred embodiment, the vent takes the form of a sleeve projecting upwardly from the holding tank and defining a vent passageway, and a cap on the sleeve which can be manually raised to open the vent passageway but which is automatically depressed to close the vent when the bowl unit is secured to the holding tank.
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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SANITATION EQUIPMENT LIMITED | CONCORD ONTARIO L4K 2S7 |
International Classification(s)

- 1985 Application Filing Year
- E03D Class
- 46 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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Stewart, John M | Ontario, CA | 61 | 647 |
# of filed Patents : 61 Total Citations : 647 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 2 Citation Count
- E03D Class
- 0 % this patent is cited more than
- 37 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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Jan 20, 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 |
Jan 26, 2017 | FPAY | FEE PAYMENT | year of fee payment: 4 |
Aug 06, 2013 | I | Issuance | |
Jul 17, 2013 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
May 03, 2012 | P | Published | |
Sep 16, 2011 | F | Filing | |
Jun 20, 2005 | PD | Priority Date |

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