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EP0516305
European procedure
Extract from the Register of European Patents
EP About this file: EP0516305
| EP0516305 - Simultaneous use of water soluble polymers with ozone in cooling water systems [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 22.08.1997 Database last updated on 24.08.2024 | Most recent event Tooltip | 22.08.1997 | No opposition filed within time limit | published on 08.10.1997 [1997/41] | Applicant(s) | For all designated states NALCO CHEMICAL COMPANY One Nalco Center Naperville, IL 60563-1198 / US | [N/P] |
| Former [1992/49] | For all designated states NALCO CHEMICAL COMPANY One Nalco Center Naperville Illinois 60563-1198 / US | Inventor(s) | 01 /
Khambatta, Binaifer S. 1096 B Heritage Hill Drive Naperville, Illinois 60563 / US | 02 /
Young, Paul R. 915 North Scott Wheaton, Illinois 60187 / US | 03 /
Fulks, Kenneth E. 4203 Raymond Avenue Brookfield, Illinois 60513 / US | [1992/49] | Representative(s) | Harrison, David Christopher, et al Mewburn Ellis LLP City Tower 40 Basinghall Street London EC2V 5DE / GB | [N/P] |
| Former [1994/28] | Harrison, David Christopher, et al MEWBURN ELLIS York House 23 Kingsway London WC2B 6HP / GB | ||
| Former [1992/49] | Harrison, David Christopher MEWBURN ELLIS York House 23 Kingsway London WC2B 6HP / GB | Application number, filing date | 92304221.2 | 11.05.1992 | [1992/49] | Priority number, date | US19910706469 | 28.05.1991 Original published format: US 706469 | [1992/49] | Filing language | EN | Procedural language | EN | Publication | Type: | A1 Application with search report | No.: | EP0516305 | Date: | 02.12.1992 | Language: | EN | [1992/49] | Type: | B1 Patent specification | No.: | EP0516305 | Date: | 16.10.1996 | Language: | EN | [1996/42] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 12.08.1992 | Classification | IPC: | C02F1/50, C02F1/78 | [1992/49] | CPC: |
C02F1/78 (EP,US);
C02F1/50 (EP,KR,US);
C02F5/10 (EP,US);
C02F5/12 (EP,US);
C02F2103/023 (EP,US)
| Designated contracting states | DE, ES, FR, GB, IT, NL [1992/49] | Title | German: | Gleichzeitige Verwendung von wasserlöslichen Polymeren mit Ozon in Kühlwasserkreisläufen | [1992/49] | English: | Simultaneous use of water soluble polymers with ozone in cooling water systems | [1992/49] | French: | Utilisation simultanée de polymères hydrosolubles avec l'ozone dans les circuits d'eau de refroidissement | [1992/49] | Examination procedure | 06.04.1993 | Examination requested [1993/23] | 15.10.1993 | Despatch of a communication from the examining division (Time limit: M06) | 21.03.1994 | Reply to a communication from the examining division | 19.07.1994 | Despatch of a communication from the examining division (Time limit: M04) | 07.11.1994 | Reply to a communication from the examining division | 09.12.1994 | Despatch of a communication from the examining division (Time limit: M06) | 26.05.1995 | Reply to a communication from the examining division | 12.07.1995 | Despatch of a communication from the examining division (Time limit: M04) | 11.09.1995 | Reply to a communication from the examining division | 15.11.1995 | Despatch of a communication from the examining division (Time limit: M02) | 21.12.1995 | Reply to a communication from the examining division | 15.03.1996 | Despatch of communication of intention to grant (Approval: Yes) | 19.04.1996 | Communication of intention to grant the patent | 10.07.1996 | Fee for grant paid | 10.07.1996 | Fee for publishing/printing paid | Opposition(s) | 17.07.1997 | No opposition filed within time limit [1997/41] | Fees paid | Renewal fee | 24.05.1994 | Renewal fee patent year 03 | 02.05.1995 | Renewal fee patent year 04 | 22.04.1996 | Renewal fee patent year 05 |
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| Responsibility for the accuracy, completeness or quality of the data displayed under the link provided lies entirely with the Unified Patent Court. | Documents cited: | Search | [A]US4997571 (ROENSCH L FRED [US], et al) | Examination | - "Computerized Water Modeling in the Design and Operation of Industrial Cooling Systems", The Inetrnational Water Conference, Oct. 20-22 1980, Pittsburg, Engineers' Society of Western Pennsylvania | - J. Westall et al, "Mineql, A Computer Program for the Calculation of Chemical Equilibrium Composition of Aqueous Systems", Technical Note no. 18, Department of Civil Engineering, Massachusetts Institute of Technology | - "Water Cycle User Reference Manual", Part 1, Pages 2-4 and 6 | - Brooke and Puckorius, Paper No. 212, The NACE Annual Conference and Corrosion Show, March 11-15, 1991, Cincinnati |