Patent US3648320A successfully refreshed from Google Patents.
US3648320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door mat
Assignee: Individual
•
Filing: 1970-10-13
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Granted: 1972-03-14
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Expires: 1990-10-13
Abstract
Abstract A mat base is molded from thermoplastic material integrally with upwardly projecting flexible bristles and with rigid nubs at spaced points between the bristles. The bristles are higher than the nubs to effect cleaning of shoes, but the nubs sustain the weight of the user and support the shoes at an elevation above the mat base to protect the bristles from breaking and to avoid contact of shoes with dirt accumulated on the base.
Inventors
- 👤 George Carr Woolley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:49
CPC Classifications
A; A47; A47L; A47L23/00; A47L23/22; A47L23/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
82 words
A door mat comprising a base, flexible bristles projecting upwardly from said base, said bristles being arranged in groups with each group of bristles having a substantially circular formation, and a plurality of rigid nubs projecting upwardly from the base at spaced points between said groups of bristles, said bristles being of a height greater than said nubs, and the mat being further characterized in that said base is moulded integrally with said bristles and with said nubs from homogeneous, thermoplastic material.
Claim 2
Dependent Claim
82 words
A door mat comprising a base, flexible bristles projecting upwardly from said base, said bristles being arranged in groups with each group of bristles having a substantially circular formation, and a plurality of rigid nubs projecting upwardly from the base at spaced points between said groups of bristles, said bristles being of a height greater than said nubs, and the mat being further characterized in that said base is moulded integrally with said bristles and with said nubs from homogeneous, thermoplastic material.
Claim 3
Dependent Claim
17 words
The device as defined in claim 1 wherein said bristles have an upwardly tapered elongated triangular configuration.
Claim 4
Dependent Claim
15 words
The device as defined in claim 1 wherein said nubs have a substantially cylindrical configuration.
Claim 5
Dependent Claim
20 words
The device as defined in claim 1 wherein said nubs have a substantially cylindrical configuration with a dome-like upper end.
Claim 6
Dependent Claim
28 words
The device as defined in claim 1 wherein said nubs are substantially cylindrical and of a diameter substantially corresponding to the circle diameter of each group of bristles.
Claim 7
Dependent Claim
35 words
The device as defined in claim 5 wherein said groups of bristles are arranged in rows in which at a selected point one of said nubs is provided in place of a group of bristles.
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) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |