US3815341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter for removing such particles and miscellaneous dirt as contained in a fluid
Assignee: Individual
•
Filing: 1971-09-14
•
Granted: 1974-06-11
•
Expires: 1991-09-14
Abstract
Abstract A filter consists of a base member, which is a coarsely woven or knitted fabric or reticulated material, with flocked fibers on the surface, the length of the fibers being between 1.5 and six times the longest diagonal line or the longest distance between the two opposite sides of the meshes. The flocked fibers are fixed at an angle between 30* and 85*. The process of preparation consists of first applying an adhesive onto the base member, in a manner not to fill the meshes, and then applying the flock fibers. The adhesive is preferably applied in sufficient amount to give a layer of 0.3 mm - 0.6mm, with a base cloth which is removed after the fibers have been fixed.
Inventors
- 👤 T Hamano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:07
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/08; B01D39/083; B01D2239/00; B01D2239/04; B01D2239/0464; B01D2239/0471; B01D2239/12; B01D2239/1225; B01D2239/1291
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
11 words
The filter according to claim 1 wherein the meshes are round.
Claim 2
Dependent Claim
11 words
The filter according to claim 1 wherein the meshes are square.
Claim 3
Dependent Claim
17 words
The filter according to claim 1 wherein the adhesive layer is of thickness between 0.3mm and 0.6mm.
Claim 4
Dependent Claim
29 words
The filter according to claim 1 wherein the base member is made of a material which is organic fibers, inorganic fibers, synthetic fibers, natural fibers, or molded synthetic resins.
Claim 5
Dependent Claim
28 words
The filter according to claim 5 wherein the flock fibers are fibers of a polyamide, a polyester, a polyacrylate, or a polypropylene, of deniers between 10 and 60.
Claim 6
Dependent Claim
16 words
The filter according to claim 6 wherein flock fibers of at least two materials are used.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |