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• 15 United States
• 10 France
• 8 Japan
• 7 China
• 5 Korea
• 2 Other

Patent Owner(s)

Patent Owner	Address
DR ING H C F PORSCHE AKTIENGESELLSCHAFT	PORSCHEPLATZ 1 STUTTGART 70435

International Classification(s)

• H01M:PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT....

• 2015 Application Filing Year
• H01M Class
• 5536 Applications Filed
• 4391 Patents Issued To-Date
• 79.32 % Issued To-Date

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Grass, Dominik	Bietigheim-Bissingen, DE	25	12
# of filed Patents : 25 Total Citations : 12
Mingers, Thierry	Sospel, FR	7	37
# of filed Patents : 7 Total Citations : 37
Schmidt, Tim	Ludwigsburg, DE	39	194
# of filed Patents : 39 Total Citations : 194

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Patent Citation Ranking

• 1 Citation Count
• H01M Class

• 31.62 % this patent is cited more than
• 7 Age

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date
7.5 Year Payment	$3600.00	$1800.00	$900.00	Dec 5, 2025
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Dec 5, 2029

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge - 7.5 year - Late payment within 6 months	$160.00	$80.00	$40.00
Surcharge - 11.5 year - Late payment within 6 months	$160.00	$80.00	$40.00
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

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
June 05, 2018	US,9991496,B2   US9991496B2	GRANTED PATENT AS SECOND PUBLICATION
December 31, 2015	US,20150380718,A1   US20150380718A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 7807830

Manufacture of pure hydralazine salts

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Abstract

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The present invention provides an improved process of preparing hydralazine hydrochloride, which involves the preparation of 1-chlorophthalazine salt and further reacting with hydrazine followed by purification of hydralazine hydrochloride, which is free of phosphate, does not contain any individual impurities more than 0.05%, total impurities less than 0.5%, and a hydrazine content of not more than 0.001%, and preferably less than 0.0003%. One benefit of improved purity is enhanced storage stability.

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Description

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Claims

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Legal Events

 

• MAFP2024
• MAFP2020
• I2016
• STCF2016
• P2015
• F2015
• AS2015

Date	Code	Event	Description
Jan 05, 2024	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 06, 2020	MAFP	MAINTENANCE FEE PAYMENT	free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY year of fee payment: 4
Jul 05, 2016	I	Issuance
Jun 15, 2016	STCF	INFORMATION ON STATUS: PATENT GRANT	free format text: PATENTED CASE
Jul 30, 2015	P	Published
Apr 03, 2015	F	Filing
Apr 03, 2015	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MANSON, RICHARD B.;MILLS, NIGEL G.;WISEMAN, TERRY R.;SIGNING DATES FROM 20090831 TO 20100823;REEL/FRAME:035331/0544 Owner name: PREMARK FEG L.L.C., ILLINOIS