Patent US4715271A successfully refreshed from Google Patents.
US4715271A
Expired / Lapsed
US
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Disposable beverage brewer
Assignee: NOAZI KASAI
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Filing: 1986-07-31
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Granted: 1987-12-29
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Expires: 2006-07-31
Abstract
Abstract Disclosed is a disposable hot beverage brewer comprised of three sections which bend along fold lines. One section further comprises a vertical fold line through its center. A filter is provided in registry with the inner faces of the three sections. Before use, the device folds flat. In use, it is opened into a triangular configuration which may be set on top of a mug or other container. Coffee, for example, is placed on the filter and hot water poured therethrough.
Inventors
- 👤 Keisuke Kitagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:46
CPC Classifications
A; A47; A47J; A47J31/00; A47J31/02; B; B65; B65D; B65D85/00; B65D85/70; B65D85/804; B65D85/8043; B65D85/8061
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
74 words
A filter brewer of triangular configuration comprising three planar side member defining an upper and a lower opening therein, a funnel-shaped filter in registry with the inner faces of the three side members, and means forming a plurality of notches formed on lower edges of the three side members, said plurality of notches being adapted to engage the upper edge of a container with the lower edges of the three side members supported thereon.
Claim 2
Dependent Claim
74 words
A filter brewer of triangular configuration comprising three planar side member defining an upper and a lower opening therein, a funnel-shaped filter in registry with the inner faces of the three side members, and means forming a plurality of notches formed on lower edges of the three side members, said plurality of notches being adapted to engage the upper edge of a container with the lower edges of the three side members supported thereon.
Claim 3
Dependent Claim
41 words
The device of claim 1 wherein one of the planar side members further comprises a vertical fold-line coinciding with the center thereof whereby the device may be collapsed into a flat configuration by folding the side member along the fold-line thereof.
Claim 4
Dependent Claim
25 words
The device of claim 2 further comprising means for preventing the filter brewer from bending along the fold line in the one planar side member.
Claim 5
Dependent Claim
28 words
The device of claim 3 wherein the means for preventing comprises a flap extending laterally through the fold line, which flap may be bent downward and maintained horizontally.
Claim 6
Dependent Claim
33 words
The device of claim 1 further comprising a cover integtral with at least two of the three side members and having a base adjacent to one of at the least two side members.
Claim 7
Dependent Claim
17 words
The device of claim 5 further comprising a tear thread extending along the base of the cover.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-28 | 1991-06-29 | 1991-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-28 | 1995-06-29 | 1995-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-28 | 1999-06-29 | 1999-12-29 | $7700.00 | Window Closed / Lapsed |