Patent US3159187A successfully refreshed from Google Patents.
US3159187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter bag fabric
Assignee: Johns Manville Corp
•
Filing: 1962-09-04
•
Granted: 1964-12-01
•
Expires: 1982-09-04
Abstract
No abstract record available.
Inventors
- 👤 Barnett Irvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:59
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/08; B01D39/083; D; D03; D03D; D03D25/00; B01D2239/00; B01D2239/06; B01D2239/065; B01D2239/0654; Y; Y10; Y10S; Y10S55/00; Y10S55/45
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A FILTER FABRIC ADAPTED TO WITHSTAND ELEVETED TEMPERATURES AND MECHANICAL SHAKING CHARACTERIZED IN THAT SAID FABRIC IS WOVEN IN A SINGLE LAYER FROM YARN CONSISTING ESSENTIALLY OF 86-99 PERCENT ASBESTOS FIBERS OF SPINNING LENGTH AND 14-1 PERCENT POLYESTER FIBERS AND HAS A WEIGHT OF 1 TO 2 POUNDS PER SQUARE YARD, THE WEAVE OF SAID FABRIC HAVING 13-16 ENDS PER INCH AND 16-19 PICKS PER INCH.
Claim 2
Dependent Claim
66 words
A FILTER FABRIC ADAPTED TO WITHSTAND ELEVETED TEMPERATURES AND MECHANICAL SHAKING CHARACTERIZED IN THAT SAID FABRIC IS WOVEN IN A SINGLE LAYER FROM YARN CONSISTING ESSENTIALLY OF 86-99 PERCENT ASBESTOS FIBERS OF SPINNING LENGTH AND 14-1 PERCENT POLYESTER FIBERS AND HAS A WEIGHT OF 1 TO 2 POUNDS PER SQUARE YARD, THE WEAVE OF SAID FABRIC HAVING 13-16 ENDS PER INCH AND 16-19 PICKS PER INCH.
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) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |