Patent US3859999A successfully refreshed from Google Patents.
US3859999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter and needle assembly incorporating the filter
Assignee: Ishikawa Manufacturing Co Ltd
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Filing: 1973-05-31
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Granted: 1975-01-14
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Expires: 1993-05-31
Abstract
Abstract A needle assembly for removing fine impurities contained in a pharmaceutical preparation or blood to be administered through the needle assembly into a human body, comprising a filter which consists of a wad of at least one lengthy filament of synthetic resin which is intricately and uniformly entwined into the wad form.
Inventors
- 👤 Soji Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:40
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/3145; B01D2239/00; B01D2239/06; B01D2239/065; B01D2239/069; B01D2239/0695; B01D2239/12; B01D2239/1291
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
162 words
A medical administering needle assembly comprising a first bored member having a longitudinal bore for conducting fluid therethrough, a second bored member disengageably fitted at one end thereof on said first bored member and having a longitudinal bore extending throughout its length and in communication with said bore in the first bored member, a needle having one end securely connected to the other end of said second bored member and having an axial bore extending throughout its length and in communication with the bore in said second bored member, and a filter which comprises a wad of at least one length of continuous filament of synthetic resin substantially uniformly entwined into wad form and located in a passageway formed between the axially aligned first and second bored members, said filament having a denier number ranging from about 75 to about 150 and said wad of the filament having a density in a range of from about 0.8 gram/cm3 to about 1.6 gram/cm3.
Claim 2
Dependent Claim
162 words
A medical administering needle assembly comprising a first bored member having a longitudinal bore for conducting fluid therethrough, a second bored member disengageably fitted at one end thereof on said first bored member and having a longitudinal bore extending throughout its length and in communication with said bore in the first bored member, a needle having one end securely connected to the other end of said second bored member and having an axial bore extending throughout its length and in communication with the bore in said second bored member, and a filter which comprises a wad of at least one length of continuous filament of synthetic resin substantially uniformly entwined into wad form and located in a passageway formed between the axially aligned first and second bored members, said filament having a denier number ranging from about 75 to about 150 and said wad of the filament having a density in a range of from about 0.8 gram/cm3 to about 1.6 gram/cm3.
Claim 3
Dependent Claim
28 words
A medical administering needle assembly as claimed in claim 1, in which said filament has a denier number in a range of from about 75 to about 85.
Claim 4
Dependent Claim
30 words
A medical administering needle assembly as claimed in claim 1 in which said wad of filament has a density in a range from about 0.8 gram/cm3 to about 1.7 gram/cm3.
Claim 5
Dependent Claim
16 words
A medical administering needle assembly as claimed in claim 1 in which said filament is curled.
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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |