Patent US3820684A successfully refreshed from Google Patents.
US3820684A
Expired / Lapsed
US
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Plastic cup
Assignee: Crest Container Corp
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Filing: 1972-10-13
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Granted: 1974-06-28
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Expires: 1992-10-13
Abstract
Abstract This is concerned with a so-called foam cup of the type made of foam polystyrene or the like intended to be used in vending machines for either hot or cold liquids and having a differential taper between the surfaces on the outside and inside of the side wall so that the surfaces of such cups when nested will contact only in a minute or highly restricted area, if at all, thus rendering them suitable for use in vending machines.
Inventors
- 👤 J Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:39
CPC Classifications
B; B65; B65D; B65D1/00; B65D1/22; B65D1/26; B65D1/265
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
141 words
An integral unitary thin wall cup made of foamed polystyrene beads having a generally tapered side wall with an integral bottom wall closing the small end and the large end being open and providing a free edge lip, the side wall having inner and outer uniform tapered surfaces with the taper of the inner surface having a slightly greater included angle than the taper of the outer surface so that the side wall is thinner, in cross section, toward the lip than it is toward the bottom wall, an offset shoulder in the inner tapered surface adjacent the bottom wall functioning as a continuous stacking annulus when a plurality of such cups are nested in a stack, the diameter of the inner tapered surface, where it intercepts the offset shoulder, being no less than the outer diameter of the bottom wall.
Claim 2
Dependent Claim
141 words
An integral unitary thin wall cup made of foamed polystyrene beads having a generally tapered side wall with an integral bottom wall closing the small end and the large end being open and providing a free edge lip, the side wall having inner and outer uniform tapered surfaces with the taper of the inner surface having a slightly greater included angle than the taper of the outer surface so that the side wall is thinner, in cross section, toward the lip than it is toward the bottom wall, an offset shoulder in the inner tapered surface adjacent the bottom wall functioning as a continuous stacking annulus when a plurality of such cups are nested in a stack, the diameter of the inner tapered surface, where it intercepts the offset shoulder, being no less than the outer diameter of the bottom wall.
Claim 3
Dependent Claim
32 words
The structure of claim 1 further characterized in that the wall of the cup is approximately 0.035 inches thick, the cup is approximately 3 1/2 inches high, and weighs approximately 3.0 grams.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |