Patent US3015367A successfully refreshed from Google Patents.
US3015367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtration media
Assignee: Pittsburgh Chemical Co
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Filing: 1955-07-19
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Granted: 1962-01-02
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Expires: 1975-07-19
Abstract
No abstract record available.
Inventors
- 👤 Stanton B Smith
- 👤 Arvo J Juhola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:14
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B32; B32B; B32B27/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A LAMINATED ARTICLE CONTAINING THREE LAYERS, THE OUTER LAYERS BEING A MIXTURE OF STAPLE COTTON AND VINYL CHLORIDE-ACETATE POLYMER FIBERS, AND THE INTERMEDIATE LAYER BEING A MIXTURE COMPRISING LONG FIBER ASBESTOS, LONG STAPLE VINYL CHLORIDEI-ACETATE POLYMER FIBER AND PARTICULATE ACTIVATED CARBON.
Claim 2
Dependent Claim
41 words
A LAMINATED ARTICLE CONTAINING THREE LAYERS, THE OUTER LAYERS BEING A MIXTURE OF STAPLE COTTON AND VINYL CHLORIDE-ACETATE POLYMER FIBERS, AND THE INTERMEDIATE LAYER BEING A MIXTURE COMPRISING LONG FIBER ASBESTOS, LONG STAPLE VINYL CHLORIDEI-ACETATE POLYMER FIBER AND PARTICULATE ACTIVATED CARBON.
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) | 1965-01-01 | 1965-07-03 | 1966-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-01 | 1969-07-03 | 1970-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-01 | 1973-07-03 | 1974-01-02 | $7700.00 | Window Closed / Lapsed |