37 CFR § 11.110 - Imputation of conflicts of interest; General rule.
(a) While practitioners are associated in a firm, none of them shall knowingly represent a client when any one of them practicing alone would be prohibited from doing so by §§ 11.107 or 11.109, unless:
(1) The prohibition is based on a personal interest of the disqualified practitioner and does not present a significant risk of materially limiting the representation of the client by the remaining practitioners in the firm; or
(ii) Written notice is promptly given to any affected former client to enable the former client to ascertain compliance with the provisions of this section, which shall include a description of the screening procedures employed; a statement of the firm's and of the screened practitioner's compliance with the USPTO Rules of Professional Conduct; a statement that review may be available before a tribunal; and an agreement by the firm to respond promptly to any written inquiries or objections by the former client about the screening procedures.
(b) When a practitioner has terminated an association with a firm, the firm is not prohibited from thereafter representing a person with interests materially adverse to those of a client represented by the formerly associated practitioner and not currently represented by the firm, unless:
(1) The matter is the same or substantially related to that in which the formerly associated practitioner represented the client; and
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