US3738889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a disposable filtering device
Assignee: AD TEC PROD
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Filing: 1971-03-01
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Granted: 1973-06-12
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Expires: 1991-03-01
Abstract
Abstract A disposable conical filtering device having gauze covered openings is characterized by structure providing a more rigid and efficient filtering device which is more convenient in use and which is particularly adapted for straining paint or the like. The novel method of producing the present filtering device is characterized by novel steps including die-cutting blanks from a strip of material and assembling the same in a rapid and economical manner with a minimum of waste material.
Inventors
- 👤 J Whelan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:11
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/085; B01D2201/00; B01D2201/02; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1074; Y10T156/1075; Y10T156/1077
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |