4. E - Fixed Constructions
  5. 03
  6. B

Maintaining readiness in fire hydrants

E - Fixed Constructions – 03 – B

Patent

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Details

E03B 9/02 (2006.01) A62C 35/68 (2006.01) E03B 9/04 (2006.01)

Patent

CA 2394034

Fire hydrants are protected from freezing by including potassium formate, preferably at least 10% by weight, in the water enclosed in them during nonuse.

Hallman John H.

B - Operations – Transporting – 01 – D
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Hyland William

E - Fixed Constructions – 03 – B
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Borden Ladner Gervais Llp

B - Operations – Transporting – 66 – D
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Clearwater Inc.

E - Fixed Constructions – 21 – B
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Clearwater International L.l.c.

C - Chemistry – Metallurgy – 09 – K
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