US PATENT SUBCLASS 152 / 209.12-- .~.~.~ Containing lugs having or appearing to have net to gross ratios of less than 35 percent (e.g., farm equipment, tractor tire, etc.)

US PATENT SUBCLASS 152 / 209.12
.~.~.~ Containing lugs having or appearing to have net to gross ratios of less than 35 percent (e.g., farm equipment, tractor tire, etc.)

Current as of: June, 1999
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152 /	HD	RESILIENT TIRES AND WHEELS

151	DF	TIRES, RESILIENT {14}
208	DF	.~ Anti-skid devices {8}
209.1	DF	.~.~ Tread {13}
209.12		.~.~.~ Containing lugs having or appearing to have net to gross ratios of less than 35 percent (e.g., farm equipment, tractor tire, etc.) {1}
209.13	DF	.~.~.~.~> Having circumferential rib at or crossing equatorial plane

DEFINITION

Classification: 152/209.12

CONTAINING LUGS HAVING OR APPEARING TO HAVE NET TO GROSS RATIOS OF 35 PERCENT OR LESS (e.g., farm equipment, tractor tire, etc.):

(under subclass 209.1) Tread having or appearing to have relatively few extremely large blocks (i.e., lugs) arranged across a tire surface such that a ratio of the area of the large block surface (i.e., net) to the overall tire surface area (i.e., gross) is equal to or less than 0.35 to 1.0 or a net to gross of 35% or less.

(1) Note. In some prior art, the net to gross ratios are not specified. In these situations, the description or drawings are reviewed to determine if the criteria hereinabove set forth seem to have been met. If the criteria seem met, placement will be proper for this subclass.