Title: Insulating drink-through closure lids for potable open-top containers

Abstract: A drink-through closure lid for hot potable open-top containers, in which at least the portion of the lid that is in contact with the inner surface of a user's upper lip during the imbibing of the hot potable is composed of heat insulating material or an insulating layer to prevent harm or discomfort to the drinker.

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Other info:

Inventors: Ruff, Stanley L. (New Rochelle, NY, US)

Application Number: 645567
Filing Date: 1975-12-31
Publication_date: 1978-04-25
Assignee:
Primary Class(es): 220/713 222/527, 222/565, 229/906.1
Other Classes:
US Patent Ref:

2534614	Dec, 1950	Michael	220/90.
2646200	Jul, 1953	Atkins	220/90.
2765639	Oct, 1956	Bryant	220/90.
3076584	Feb, 1963	Sherlock	220/266.
3171580	Mar, 1965	Davis et al.	220/268.
3625785	Dec, 1971	Holmstrom et al.	220/9.
3730399	May, 1973	Dibrell et al.	220/90.
3739976	Jun, 1973	MacDaniel	229/43.
3797696	Mar, 1974	Dibrell	220/90.
3806023	Apr, 1974	Barnett	220/90.
3868043	Feb, 1975	Freemyer	220/90.
3917100	Nov, 1975	Dukess	215/347.

Other Refs:
Primary Examiner: Lowrance, George E.
Assistant Examiner: Shoap, Allan N.
Attorney: Kirschstein, Kirschstein, Ottinger, Frank & Cobrin