US3651947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter
Assignee: Rudd Melikian Inc
•
Filing: 1970-03-11
•
Granted: 1972-03-28
•
Expires: 1990-03-11
Abstract
Abstract A filter is provided for beverage machines such as coffee machines. The filter material is a layer of woven or molded polymeric plastic having a mesh size of between about 52 and 70 microns. Filter material is supported by a coarse support grid which in turn is supported by a carrier.
Inventors
- 👤 George R Schollhamer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:48
CPC Classifications
A; A47; A47J; A47J31/00; A47J31/44; A47J31/4403; A47J31/446
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A filter as defined in claim 1 wherein said support surface is formed integrally with said carrier and comprises a plurality of holes of substantially uniform size, and said support surface is relatively coarse and corresponding to the appearance of a woven mesh screen.
Claim 2
Dependent Claim
105 words
A filter as defined in claim 1 wherein said first peripheral inner wall terminates below the plane of said peripheral top wall, said support surface comprising a screen, said screen being 18 X 18 mesh and being woven from stainless steel wire having a diameter of about 0.017 inches, said screen underlying said layer of filter mateiral in supporting relation thereto, a circumferential portion of said screen overlying said inner peripheral wall and being disposed between said circumferential portion of said layer of filter material and said inner wall so that said sealing ring constrains said screen in contact with said layer of filter material.
References Cited (Backward Citations)
US3382305A
Cited
DE1157197B
Cited
US3165473A
Cited
US3206031A
Cited
US3334753A
Cited
US3348695A
Cited
US3500991A
Cited
US3496861A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |