US4362623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coffee filter system
Assignee: Individual
•
Filing: 1981-10-23
•
Granted: 1982-12-07
•
Expires: 2001-10-23
Abstract
Abstract System for packaging cup-like coffee filters, consisting of nesting the filters so that their upper edges form a frusto-conical surface and of providing a tab associated with each filter, so that the innermost filter can be readily separated from the others.
Inventors
- 👤 Vaino J. Holopainen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:37
CPC Classifications
B; B65; B65D; B65D71/00; A; A47; A47J; A47J31/00; A47J31/06; A47J31/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
99 words
Coffee filter system, comprising: (a) a plurality of cup-like disposable filters, each filter having a generally circular bottom wall and a generally frusto-conical side wall, said filters being arranged in a nested stack, and (b) a continuous elongated tab element that is threaded sinuously from one side to another of the plurality of filters to form a tab associated with the innermost filter and which is accessible for grasping by the fingers of a user, so that, as the tab is pulled upwardly, the element lifts the filters one at a time from the remaining filters in the stack,
Claim 2
Dependent Claim
99 words
Coffee filter system, comprising: (a) a plurality of cup-like disposable filters, each filter having a generally circular bottom wall and a generally frusto-conical side wall, said filters being arranged in a nested stack, and (b) a continuous elongated tab element that is threaded sinuously from one side to another of the plurality of filters to form a tab associated with the innermost filter and which is accessible for grasping by the fingers of a user, so that, as the tab is pulled upwardly, the element lifts the filters one at a time from the remaining filters in the stack,
Claim 3
Dependent Claim
25 words
Coffee filter system as recited in claim 1, wherein the filter is formed from flat sheet and the side wall is provided with vertical corrugations.
Claim 4
Dependent Claim
42 words
Coffee filter systems as recited in claim 2, wherein the nesting of the filters causes their top edges to lie along a generally conical surface that inclines downwardly and outwardly, thus assisting in the separation of the innermost filter from the nest.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-06 | 1986-06-07 | 1986-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-06 | 1990-06-07 | 1990-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-06 | 1994-06-07 | 1994-12-07 | $7700.00 | Window Closed / Lapsed |