Accumulation of polymer on equipment, which is in contact with polymerizable material during normal process operation, is minimized by the method and apparatus of the present invention. The method involves positioning and affixing the equipment, such as a pressure relief device, to process apparatus, such as a distillation column, proximate to a wetted region formed …

Legal parties

Inventors (applicants): Michael Stanley DeCourcy, John O. Barnett, Michael W. Hurley
Assignees (initial): Rohm and Haas Company (Philadelphia, US)
Agents: Marcella M. Bodner (attorney)

The application was examined by Virginia Manoharan (USPTO dept. 1776)


  • 1. An apparatus for minimizing accumulation of polymerizable material on equipment affixed to said apparatus …
  • 2. The apparatus of claim 1 , wherein said safety device is at least one pressure …
  • 3. The apparatus of claim 1 , wherein said process apparatus is a separations vessel …

Cited documents


  • Gerlicher US 3629113 A / 508/366, Dec. 1, 1971
  • Matsumoto et al. US 6409886 B1 / 203/8, Jun. 1, 2002
  • DeCourcy et al. US 6983758 B2 / 137/68.23, Jan. 1, 2006
  • Matsumoto et al. US 6878239 B1 / 203/8, Apr. 1, 2005
  • Mitsumoto et al. US 7282118 B2 / 203/8, Oct. 1, 2007
  • Martin et al. US 6469201 B1 / 560/205, Oct. 1, 2002
  • Nezu et al. US 4369097 A / 203/8, Jan. 1, 1983
  • Ijiri et al. US 6627047 B1 / 203/49, Sep. 1, 2003
  • Diehl et al. US 7150809 B2 / 203/8, Dec. 1, 2006
  • Hamamoto et al. US 6676808 B2 / 203/8, Jan. 1, 2004


Brief Description of the Drawings

A more complete understanding of the present invention will be gained from the embodiments discussed hereinafter and with reference to the accompanying drawings, in which like reference numbers indicate …


Field of the Invention

The present invention relates to a method for minimizing accumulation of polymer on process equipment, such as pressure relief devices, during chemical processes such as the production of polymerizable materials …

Cross Reference to Related Patent Applications

This non-provisional application is a divisional of non-provisional U.S. patent application Ser. No. 11/796,100, filed Apr. 26, 2007, now granted and issued as U.S. Pat. No. 8,157,969 on Apr. 17, 2012 …

Detailed Description of the Invention

The method and apparatus of the present invention address the need to minimize accumulation of polymer on process equipment, such as safety devices, which are in service in processes …

More details about Method and Apparatus for Minimizing Accumulation of Polymer on Process Equipment, Especially Safety Devices

Miscellaneous patent data

The application publication date is Feb. 7, 2012, illustrated by 6 drawings, the assignee location is Philadelphia (US); its organization is Rohm and Haas Company, the invention details are shown in 9 figures, the claim 1 is exemplary as chosen by the examiner, the agent's name is Marcella M. Bodner, the invention is named Method and Apparatus for Minimizing Accumulation of Polymer on Process Equipment, Especially Safety Devices, the assignee is categorized as a United States company, particularly claims an apparatus for minimizing accumulation of polymerizable material on equipment…, the protection scope is defined by 5 claims, numbered 13/367,784 (application), the grant number is 08470135 (publication number), similar categories include Indirectly heated, fluid injection, Concentric with still, rigid self-supporting filtering material, discharging filtrate, After-treatment of removed components, one or more auxiliary substances, Residue offtakes, Conveying, feeding, invented by Michael W. Hurley et al., was examined by Virginia Manoharan, the main examiner (1776 USPTO department), includes the following drawings: Schematic, cut-away oblique view of an alternative, Schematic, partially cut-away elevational side, Method and Apparatus for Minimizing, Schematic, cross-sectional elevational side view, categorized under Apparatus as a primary classification, the known applicant's name is Michael W. Hurley, the applicant's state - TX, city - Katy, the patent was granted on Jun. 25, 2013, the known inventor's name is Barnett John O., the inventor's state is TX, city - Houston.

Invention classification information

The invention is classified under Accessories and details, by absorption, Evaporating, Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping, Moving film, Apparatus, In fluid flow path, Still, Rupture disc, Contact Devices, Safety Devices. The designated search classifications include Moving film, Including Purging of the System, Accessories and details, For inhibiting or preventing a polymerization reaction, Safety cut-off, Rupture disc, Contact Devices, In fluid flow path, Safety Devices, Of unsaturated hydrocarbon, Still, Apparatus.

Patent details
Publication number 08470135
Publication date Jun. 25, 2013
Kind code B2
Application number 13/367,784
Application date Feb. 7, 2012
Application type U
Application series code 13
National classification 202/81
Total number of claims 5
Exemplary claims 1
Number of drawings 6
Number of figures 9
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