NL7803036A - 4-(5-fluormethyl-2-pyridyloxy)fenoxyalkaan- carbonzuren en derivaten daarvan. - Google Patents

4-(5-fluormethyl-2-pyridyloxy)fenoxyalkaan- carbonzuren en derivaten daarvan.

Info

Publication number
NL7803036A
NL7803036A NL7803036A NL7803036A NL7803036A NL 7803036 A NL7803036 A NL 7803036A NL 7803036 A NL7803036 A NL 7803036A NL 7803036 A NL7803036 A NL 7803036A NL 7803036 A NL7803036 A NL 7803036A
Authority
NL
Netherlands
Prior art keywords
phenoxyalcane
fluormethyl
pyridyloxy
derivatives
carbonic acids
Prior art date
Application number
NL7803036A
Other languages
English (en)
Other versions
NL178003C (nl
NL178003B (nl
Original Assignee
Ishihara Mining & Chemical Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=36764260&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=NL7803036(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Ishihara Mining & Chemical Co filed Critical Ishihara Mining & Chemical Co
Publication of NL7803036A publication Critical patent/NL7803036A/nl
Publication of NL178003B publication Critical patent/NL178003B/nl
Application granted granted Critical
Publication of NL178003C publication Critical patent/NL178003C/nl

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/62—Oxygen or sulfur atoms
    • C07D213/63—One oxygen atom
    • C07D213/64—One oxygen atom attached in position 2 or 6
    • C07D213/643—2-Phenoxypyridines; Derivatives thereof
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
    • A01N43/40—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
    • A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
    • A01N47/10—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof
    • A01N47/12—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof containing a —O—CO—N< group, or a thio analogue thereof, neither directly attached to a ring nor the nitrogen atom being a member of a heterocyclic ring

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Plant Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Agronomy & Crop Science (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Pyridine Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
NLAANVRAGE7803036,A 1977-07-21 1978-03-21 Alfa-(4-(5'-gesubstitueerd 2'-pyridyloxy of 3'-chloor-2'-pyridyloxy) fenoxy) propionzuur en alkyl-, alkenylof cycloalkylesters en zouten daarvan en herbicide preparaat, dat een dergelijke verbinding als werkzame stof bevat. NL178003C (nl)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP52086636A JPS5840947B2 (ja) 1977-07-21 1977-07-21 トリフルオロメチルピリドキシフェノキシプロピオン酸誘導体
AU86647/82A AU574041B2 (en) 1977-07-21 1982-07-30 4(5-fluoromethyl-2-pyridyloxy)phenoxyalkanecarboxylic acids

Publications (3)

Publication Number Publication Date
NL7803036A true NL7803036A (nl) 1979-01-23
NL178003B NL178003B (nl) 1985-08-01
NL178003C NL178003C (nl) 1991-10-16

Family

ID=36764260

Family Applications (2)

Application Number Title Priority Date Filing Date
NLAANVRAGE7803036,A NL178003C (nl) 1977-07-21 1978-03-21 Alfa-(4-(5'-gesubstitueerd 2'-pyridyloxy of 3'-chloor-2'-pyridyloxy) fenoxy) propionzuur en alkyl-, alkenylof cycloalkylesters en zouten daarvan en herbicide preparaat, dat een dergelijke verbinding als werkzame stof bevat.
NL971026C NL971026I2 (nl) 1977-07-21 1997-08-06 Alfa-Ä4-(5'-gesubstitueerd 2'-pyridyloxy of 3'-ch loor-2'-pyridyloxy) fenoxyÜ propionzuur en alkel-,alkenylof cycloalkylesters en zouten daarvan en herbicide preparaat, dat een dergelijke verbinding als werkzame stof bevat.

Family Applications After (1)

Application Number Title Priority Date Filing Date
NL971026C NL971026I2 (nl) 1977-07-21 1997-08-06 Alfa-Ä4-(5'-gesubstitueerd 2'-pyridyloxy of 3'-ch loor-2'-pyridyloxy) fenoxyÜ propionzuur en alkel-,alkenylof cycloalkylesters en zouten daarvan en herbicide preparaat, dat een dergelijke verbinding als werkzame stof bevat.

Country Status (26)

Country Link
JP (1) JPS5840947B2 (nl)
AU (2) AU527957B2 (nl)
BE (1) BE868875A (nl)
BG (1) BG28557A3 (nl)
BR (1) BR7801717A (nl)
CA (1) CA1243321A (nl)
CH (1) CH629487A5 (nl)
CY (2) CY1191A (nl)
DD (1) DD135345A5 (nl)
DE (1) DE2812571C2 (nl)
DK (1) DK154213C (nl)
EG (1) EG13774A (nl)
ES (1) ES468113A1 (nl)
FR (2) FR2398059A1 (nl)
GB (2) GB1599121A (nl)
IL (1) IL55089A (nl)
IT (1) IT1104621B (nl)
KE (2) KE3288A (nl)
MY (2) MY8400222A (nl)
NL (2) NL178003C (nl)
NZ (1) NZ186741A (nl)
PH (1) PH14799A (nl)
PL (1) PL110908B1 (nl)
SU (1) SU803845A3 (nl)
TR (1) TR19824A (nl)
ZA (1) ZA781591B (nl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028870A1 (en) * 1977-08-12 1981-05-20 Imperial Chemical Industries Plc Phenoxypyridine compound

Families Citing this family (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54119476A (en) * 1978-03-10 1979-09-17 Ishihara Sangyo Kaisha Ltd 4-(5-fluoromethyl-2-pyridyloxy)phenoxyalkanecarbocyic acid derivatives and their preparation
CA1247625A (en) * 1977-07-22 1988-12-28 Howard Johnston Trifluoromethyl pyridinyloxyphenoxy propanoic acids and propanols and derivatives thereof and methods of herbicidal use
ZA784334B (en) * 1977-08-12 1979-07-25 Ici Ltd Herbicidal pyridine compounds
JPS5461182A (en) * 1977-10-20 1979-05-17 Ishihara Sangyo Kaisha Ltd 2-phenoxy-5-trifluoromethylpyridine compounds
JPS5461183A (en) * 1977-10-21 1979-05-17 Ishihara Sangyo Kaisha Ltd 2-substituted-5-trifluoromethyl pyridine compounds
DE2755536A1 (de) * 1977-12-13 1979-06-21 Ciba Geigy Ag Neue herbizid und pflanzenregulatorisch wirksame pyridyloxy-phenoxy-propionsaeurederivate
EP0003648A3 (en) 1978-02-15 1979-09-05 Imperial Chemical Industries Plc 4-aryloxy-substituted phenoxypropionamide derivatives useful as herbicides, compositions containing them, and processes for making them
EP0003877B1 (en) * 1978-02-15 1988-02-03 Imperial Chemical Industries Plc Herbicidal derivatives of 2-(4(2-pyridyloxy)phenoxy)propane, processes for preparing them, and herbicidal compositions containing them
CY1233A (en) * 1978-03-01 1984-06-29 Ici Plc Herbicidal pyridine compounds,processes for preparing them and herbicidal processes and compositions utilising them
GB2026865A (en) * 1978-03-01 1980-02-13 Ici Ltd Herbicides
JPS54144375A (en) * 1978-04-27 1979-11-10 Ishihara Sangyo Kaisha Ltd 4-(5-trifluoromethyl-2-pyridyloxy)phenoxyalkane derivative and herbicide containing the same
DD151037A5 (de) * 1978-07-03 1981-09-30 Ciba Geigy Ag Herbizides und das pflanzenwachstum regulierendes mittel
BR8005226A (pt) * 1979-08-23 1981-03-04 Du Pont Composto herbicida, composicao e processo para o controle de vegetacao indesejavel, composicao e processo para o controle de er vas gramineas em plantas de folhas grandes e processo para preparar um composto herbicida
US4330321A (en) * 1981-03-16 1982-05-18 The Dow Chemical Company Compounds and method for selectively controlling grassy weeds in broadleaved crops
US4525205A (en) * 1982-01-22 1985-06-25 Zoecon Corporation Herbicidal compositions comprising compounds containing a phenylaminophenoxy moiety
JPS5832890A (ja) * 1981-08-21 1983-02-25 Sumitomo Chem Co Ltd ホスホン酸エステル誘導体、その製造方法およびそれを有効成分とする除草剤
JPS58183666A (ja) * 1982-04-20 1983-10-26 Nippon Tokushu Noyaku Seizo Kk 置換フエノキシプロピオン酸エステル、その製造中間体、該エステル及び該中間体の製法、並びに除草剤
US4851539A (en) * 1982-06-18 1989-07-25 The Dow Chemical Company 2,3-Difluoropyridine and 3-fluoro-2-pyridinyloxyphenol compounds
US4473696A (en) 1982-10-07 1984-09-25 Ici Americas Inc. Synthesis of 2-substituted-5-methyl-pyridines
IL71668A (en) * 1983-05-13 1988-07-31 Dow Chemical Co Method of preparing esters of aryloxyphenoxy propanoic acid
US4528394A (en) * 1983-08-03 1985-07-09 The Dow Chemical Company Preparation of hydroxyaromatic ethers
US4517368A (en) * 1983-09-06 1985-05-14 The Dow Chemical Company 2,3-Dichloro-5-iodopyridine and methods of making and using the same
EP0144137A1 (en) * 1983-10-27 1985-06-12 Stauffer Chemical Company Synergistic herbicidal compositions
JPS60136561A (ja) * 1983-11-28 1985-07-20 ザ・ダウ・ケミカル・カンパニ− ２−（４−〔（３−クロロ−５−ヨ−ド−２−ピリジニル）オキシ〕フエノキシ）プロピオン酸及びその誘導体並びにそれらの製造方法
JPS61135600A (ja) * 1984-12-04 1986-06-23 Nissan Chem Ind Ltd 酵素による２―（４―ヒドロキシフェノキシ）プロピオン酸低級アルキルの光学分割法
JPS62267275A (ja) * 1986-05-16 1987-11-19 Aguro Kanesho Kk プロピオン酸チオ−ルエステル誘導体
JPS62267274A (ja) * 1986-05-16 1987-11-19 Aguro Kanesho Kk １，２，４−オキサジアゾ−ル誘導体
JPS62273954A (ja) * 1986-05-21 1987-11-28 Aguro Kanesho Kk ヒドロキシ酢酸アミド誘導体
JPS6263573A (ja) * 1986-08-15 1987-03-20 Ishihara Sangyo Kaisha Ltd トリフルオロメチルピリドキシフエノキシプロピオン酸またはその誘導体
CA1257598A (en) * 1987-08-11 1989-07-18 Harukazu Fukami Herbicidally active phenoxyalkanecarboxylic acid derivatives
US5205855A (en) * 1987-08-11 1993-04-27 Suntory Limited Herbicidally active phenoxyalkanecarboxylic acid derivatives
DE3806294A1 (de) * 1988-02-27 1989-09-07 Hoechst Ag Herbizide mittel in form von waessrigen mikroemulsionen
US4935522A (en) * 1988-03-21 1990-06-19 Hoechst Celanese Corporation Process for producing ethyl 2-[4'-(6"-chloro-2"-benzoxazolyloxy)phenoxy]propionate
US4908476A (en) * 1988-03-21 1990-03-13 Hoechst Celanese Corporation Synthesis of 2-(4-hydroxyphenoxy)alkanoic acids
US5008439A (en) * 1988-03-21 1991-04-16 Hoechst Celanese Corporation Synthesis of 2-(4-hydroxyphenoxy) alkanoic acid esters
DE3902439A1 (de) * 1989-01-27 1990-08-02 Basf Ag Pflanzenschuetzende mittel auf basis von 1-aryl- bzw. 1-hetarylimidazolcarbonsaeureestern
MX9205213A (es) * 1991-09-12 1993-06-01 Ici Plc Interaccion sinergistica de derivados de acido ariloxipropionico y ciclohexanodionas herbicidas
EP2052607A1 (de) 2007-10-24 2009-04-29 Bayer CropScience AG Herbizid-Kombination
DE102008037622A1 (de) 2008-08-14 2010-02-25 Bayer Cropscience Ag Herbizid-Kombination mit Dimethoxytriazinyl-substituierten Difluormethansulfonylaniliden
PL212812B1 (pl) 2009-03-14 2012-11-30 Bl Lab Spolka Z Ograniczona Odpowiedzialnoscia Uklad do prowadzenia termolizy odpadowych tworzyw sztucznych oraz sposób prowadzenia termolizy w sposób ciagly
WO2023222836A1 (en) 2022-05-20 2023-11-23 Syngenta Crop Protection Ag Herbicidal compositions

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2223894C3 (de) * 1972-05-17 1981-07-23 Hoechst Ag, 6000 Frankfurt Herbizide Mittel auf Basis von Phenoxycarbonsäurederivaten
DE2433067B2 (de) * 1974-07-10 1977-11-24 a- [4-(4" Trifluormethylphenoxy)-phenoxy] -propionsäuren und deren Derivate, Verfahren zu ihrer Herstellung und diese enthaltende herbizide Mittel Hoechst AG, 6000 Frankfurt Alpha- eckige klammer auf 4-(4' trifluormethylphenoxy)-phenoxy eckige klammer zu -propionsaeuren und deren derivate, verfahren zu ihrer herstellung und diese enthaltende herbizide mittel
CS185694B2 (en) * 1974-07-17 1978-10-31 Ishihara Sangyo Kaisha Herbicidal agent
DK154074C (da) * 1974-10-17 1989-02-27 Ishihara Sangyo Kaisha Alfa-(4-(5 eller 3,5 substitueret pyridyl-2-oxy)-phenoxy)-alkan-carboxylsyrer eller derivater deraf til anvendelse som herbicider, herbicidt middel samt fremgangsmaader til bekaempelse af ukrudt
GB1512189A (en) * 1975-10-29 1978-05-24 Ishihara Mining & Chemical Co Herbicidal composition and method of use thereof
DE2861073D1 (en) * 1977-06-29 1981-12-03 Ciba Geigy Ag Pyridyloxy-phenoxy-alkanoic acid derivatives , processes for their preparation and their use as herbicides or plant growth regulators
CA1247625A (en) * 1977-07-22 1988-12-28 Howard Johnston Trifluoromethyl pyridinyloxyphenoxy propanoic acids and propanols and derivatives thereof and methods of herbicidal use
EP0028870B1 (en) * 1977-08-12 1988-03-16 Imperial Chemical Industries Plc Phenoxypyridine compound
AU516691B2 (en) * 1977-12-15 1981-06-18 Ciba-Geigy Ag Pyridyloxy-phenoxy-propionic acid derivatives with herbicidal and plant growth regulating properties

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028870A1 (en) * 1977-08-12 1981-05-20 Imperial Chemical Industries Plc Phenoxypyridine compound

Also Published As

Publication number Publication date
JPS5840947B2 (ja) 1983-09-08
FR2501684B1 (fr) 1985-07-19
CY1191A (en) 1983-10-07
DD135345A5 (de) 1979-05-02
BE868875A (fr) 1979-01-10
EG13774A (en) 1984-03-31
NZ186741A (en) 1981-02-11
DK154213C (da) 1989-05-22
ES468113A1 (es) 1980-04-16
KE3288A (en) 1983-06-17
DK120978A (da) 1979-01-22
CH629487A5 (en) 1982-04-30
FR2398059A1 (fr) 1979-02-16
NL178003C (nl) 1991-10-16
FR2501684A1 (fr) 1982-09-17
GB1599126A (en) 1981-09-30
JPS5422371A (en) 1979-02-20
PH14799A (en) 1981-12-09
CY1190A (en) 1983-10-07
BG28557A3 (bg) 1980-05-15
TR19824A (tr) 1980-01-24
AU527957B2 (en) 1983-03-31
GB1599121A (en) 1981-09-30
AU3434278A (en) 1979-09-27
NL178003B (nl) 1985-08-01
DE2812571C2 (de) 1985-07-25
FR2398059B1 (nl) 1983-05-20
AU8664782A (en) 1983-01-13
MY8400223A (en) 1984-12-31
DE2812571A1 (de) 1979-02-01
BR7801717A (pt) 1979-03-20
AU574041B2 (en) 1988-06-30
NL971026I2 (nl) 1998-03-02
PL205461A1 (pl) 1979-02-12
NL971026I1 (nl) 1997-10-01
PL110908B1 (en) 1980-08-30
MY8400222A (en) 1984-12-31
IL55089A (en) 1985-01-31
CA1243321A (en) 1988-10-18
DK154213B (da) 1988-10-24
KE3287A (en) 1983-06-17
IT1104621B (it) 1985-10-21
IT7848523A0 (it) 1978-03-21
SU803845A3 (ru) 1981-02-07
ZA781591B (en) 1979-03-28

Similar Documents

Publication Publication Date Title
NL7803036A (nl) 4-(5-fluormethyl-2-pyridyloxy)fenoxyalkaan- carbonzuren en derivaten daarvan.
DK377678A (da) 3,4,5-trihydroxypiperidinderivater deres fremstilling og anvendelse
NL7712750A (nl) 1-carba-2-penem-3-carbonzuur en derivaten.
NL7806126A (nl) Penicillaanzuur 1,1-dioxide en esters daarvan.
NL7802671A (nl) Cefemderivaten en hun bereiding.
NL7606655A (nl) Imidylbenzeendi- en -tricarbonzuurderivaten.
DK324777A (da) 15-deoxy-16-hydroxy-16-substituerede prostansyrer og beslagtede forbindelser
FI780954A (fi) 5-(4-(diarylmetyl)-1-piperazinylalkyl) bensimidazolderivat
DK147378A (da) Imidazodiazepinderivater samt fremgangsmaade til fremstilling deraf
IT7820326A0 (it) Fotocellula e procedimento per lasua fabbricazione.
NL7808011A (nl) Norbornaan- en norborneen-derivaten.
SE7801946L (sv) Reversibel pumpturbin
DK281377A (da) Joderede isophthalamsyrederivater og fremgangsmade til fremstilling deraf
DK355378A (da) 4-hydroxy-2-benzimidazonderivater og fremgangsmaade deraf
DK88478A (da) Reversibel plov
NO150761C (no) 3,4-dihydro-2-metyl-4-okso-2h-1,2-benzotiazin-3-karboksylsyre-1,1-dioksyd og fremgangsmaate for fremstilling derav
NO802889L (no) 2-amino-4-substituerte-thiazolcarboxylsyrer og derivater derav
TR20562A (tr) Fungisid 3-(n-asil-n-arilamino)-gamma-butirolaktonlar ve butirolaktonlar ve gamma-butirotiolaktonlar
NL7803725A (nl) 4-alkylthio-2-trifluormethylalkaansulfonaniliden en derivaten daarvan.
NL7801927A (nl) Gesubstitueerde pyrrolochinoxalinonen en pyrrolobenzodiazepinonen.
NL7808443A (nl) Arylfosfonieten en arylthiofosfonieten.
SE7808530L (sv) Nya 2-pyridyl- och 2-pyrimidylaminobensoesyror
NO802887L (no) 2-substituerte-4-alkyl- eller -4-trihalogenalkyl-5-oxazolcarboxylsyrer og derivater derav
PT68572A (de) Zahn-und mundpflegemittel.
IT1077678B (it) Testa protacaratteri

Legal Events

Date Code Title Description
BA A request for search or an international-type search has been filed
BB A search report has been drawn up
BC A request for examination has been filed
A85 Still pending on 85-01-01
R1B Notice of opposition during period of laying open
NP1G Patent granted (not automatically) [patent specification modified]
AC1 Application for a supplementary protection certificate

Free format text: 971026, 970806

KC1 Grant of a supplementary protection certificate

Free format text: 971026, 19980321, EXPIRES: 20000425

V4 Discontinued because of reaching the maximum lifetime of a patent

Free format text: 980321