Patent US3767520A successfully refreshed from Google Patents.
US3767520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extruded fibrous liquid reservoir and method of making same
Assignee: Plastic Specialties and Technologies Inc
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Filing: 1971-11-24
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Granted: 1973-10-23
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Expires: 1991-11-24
Abstract
Abstract The reservoir comprises a length of raw filamentary tow encased in a plastic sleeve.
Inventors
- 👤 F Dick
- 👤 P Seckel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:21
CPC Classifications
B; B43; B43K; B43K8/00; B43K8/02; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/2973; Y10T428/2975; Y10T428/2978
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
71 words
A fluid reservoir adapted for use in a marking implement and including: a. a transversely compressed raw synthetic filamentary tow comprising an elongated bundle of crimped deregistered longitudinally extending filaments, said tow having an outer surface, and, b. an elongated shape retaining impervious plastic sleeve encapulating said filamentary tow and having inner and outer surfaces, the inner surface of which is melted onto and around the outer surface of said tow.
Claim 2
Dependent Claim
71 words
A fluid reservoir adapted for use in a marking implement and including: a. a transversely compressed raw synthetic filamentary tow comprising an elongated bundle of crimped deregistered longitudinally extending filaments, said tow having an outer surface, and, b. an elongated shape retaining impervious plastic sleeve encapulating said filamentary tow and having inner and outer surfaces, the inner surface of which is melted onto and around the outer surface of said tow.
Claim 3
Dependent Claim
37 words
A fluid reservoir according to claim 1 wherein said filamentary tow is a polyester filamentous material and said plastic sleeve further includes a channel in the outer surface of said sleeve which extends substantially the length thereof.
Claim 4
Dependent Claim
69 words
A fluid reservoir adapted for use in a marking implement and including: a. an elongated impervious plastic sleeve having inner and outer surfaces; and b. a length of deregistered raw filamentary tow comprising an elongated bundle of crimped longitudinally extending filaments transversely compressed and confined within said plastic sleeve; and c. a plurality of substantially uncrimped threads within said plastic sleeve and extending the length of said filamentary tow.
Claim 5
Dependent Claim
69 words
A fluid reservoir adapted for use in a marking implement and including: a. an elongated impervious plastic sleeve having inner and outer surfaces; and b. a length of deregistered raw filamentary tow comprising an elongated bundle of crimped longitudinally extending filaments transversely compressed and confined within said plastic sleeve; and c. a plurality of substantially uncrimped threads within said plastic sleeve and extending the length of said filamentary tow.
Claim 6
Dependent Claim
35 words
A fluid reservoir according to claim 3 wherein said filamentary tow is a polyester filamentous material and said threads are spaced around the periphery thereof and bear against the inner surface of said plastic sleeve.
References Cited (Backward Citations)
US3126095A
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US2547541A
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GB950243A
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US3428723A
Cited
US3355239A
Cited
US3510934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |