Patent US4495030B successfully refreshed from Google Patents.
US4495030B
Expired / Lapsed
US
⏱️ 0.0 years remaining
US4495030B - - Google Patents
Assignee: Wyeth Holdings LLC
•
Filing: 1983-12-15
•
Granted: —
•
Expires: 2003-12-15
Abstract
Abstract A toxic vapour absorptive nonwoven filter material comprising a wet-laid sheet containing fibrillated binder fibre, active carbon in fibre or particle form and submicron diameter glass fibre. The surface of the filter material may by treated with a hydrophobic or an oleophobic agent.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:05
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2055; B01D39/2058; B01D39/2062; A; A62; A62B; A62B23/00; A62D; A62D9/00; B01D39/2003; B01D39/2017; B01D39/2024; B01D39/2065; D; D21; D21H; D21H13/00; D21H13/10; D21H13/12; D21H13/18; D21H13/36; D21H13/38; D21H13/40; D21H13/46; D21H13/50; D21H17/00; D21H17/63; D21H17/67; D21H27/00; D21H27/08; B01D2239/00; B01D2239/04; B01D2239/0414; B01D2239/0428; B01D2239/06; B01D2239/0604; B01D2239/064; B01D2239/08; B01D2239/086; B01D2239/12; B01D2239/1225; B01D2239/1241; Y; Y10; Y10S; Y10S428/00; Y10S428/903; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T442/00; Y10T442/20; Y10T442/2164; Y10T442/2172; Y10T442/2189; Y10T442/60; Y10T442/697
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.