CA956657A - Fire door closing system - Google Patents

Fire door closing system

Info

Publication number
CA956657A
CA956657A CA146,502A CA146502A CA956657A CA 956657 A CA956657 A CA 956657A CA 146502 A CA146502 A CA 146502A CA 956657 A CA956657 A CA 956657A
Authority
CA
Canada
Prior art keywords
fire door
door closing
closing system
fire
door
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
CA146,502A
Other versions
CA146502S (en
Inventor
Herman Y. Martindill
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UNITED SPECIALTIES
Original Assignee
UNITED SPECIALTIES
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
Application filed by UNITED SPECIALTIES filed Critical UNITED SPECIALTIES
Priority to CA146,502A priority Critical patent/CA956657A/en
Application granted granted Critical
Publication of CA956657A publication Critical patent/CA956657A/en
Expired legal-status Critical Current

Links

CA146,502A 1972-07-06 1972-07-06 Fire door closing system Expired CA956657A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA146,502A CA956657A (en) 1972-07-06 1972-07-06 Fire door closing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA146,502A CA956657A (en) 1972-07-06 1972-07-06 Fire door closing system

Publications (1)

Publication Number Publication Date
CA956657A true CA956657A (en) 1974-10-22

Family

ID=4093759

Family Applications (1)

Application Number Title Priority Date Filing Date
CA146,502A Expired CA956657A (en) 1972-07-06 1972-07-06 Fire door closing system

Country Status (1)

Country Link
CA (1) CA956657A (en)

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