US3250398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beverage filters
Assignee: Pall Corp
•
Filing: 1964-01-27
•
Granted: 1966-05-10
•
Expires: 1984-01-27
Abstract
No abstract record available.
Inventors
- 👤 Joseph G Adiletta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:33
CPC Classifications
A; A47; A47J; A47J31/00; A47J31/06; A47J31/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A HOT BEVERAGE FILTER RESISTANT TO DETERIORATION OF THE TEMPERATURE OF BOILING WATER CONSISTING ESSENTIALLY OF A WOVEN GLASS FABRIC SUBSTRATE HAVING OPEN PORES THERETHROUGH OF A PORE SIZE LARGER THAN 30 MICRONS, HAVING THEREON A LAYER OF FLUORINATED OLEFIN PLASTIC SELECTED FROM THE GROUP CONSISTING OF POLY(TETRAFLUROETHYLENE) AND POLY(CHLOROTRIFLUOROETHYLENE) IN AN AMOUNT WITHIN THE RANGE FROM 20 TO 40% BY WEIGHT PLASTIC, THEREBY REDUCING THE PORE SIZE OF THE GLASS FABRIC SUBSTRATE TO BETWEEN 30 AND ABOUT 100 MICRONS.
Claim 2
Dependent Claim
80 words
A HOT BEVERAGE FILTER RESISTANT TO DETERIORATION OF THE TEMPERATURE OF BOILING WATER CONSISTING ESSENTIALLY OF A WOVEN GLASS FABRIC SUBSTRATE HAVING OPEN PORES THERETHROUGH OF A PORE SIZE LARGER THAN 30 MICRONS, HAVING THEREON A LAYER OF FLUORINATED OLEFIN PLASTIC SELECTED FROM THE GROUP CONSISTING OF POLY(TETRAFLUROETHYLENE) AND POLY(CHLOROTRIFLUOROETHYLENE) IN AN AMOUNT WITHIN THE RANGE FROM 20 TO 40% BY WEIGHT PLASTIC, THEREBY REDUCING THE PORE SIZE OF THE GLASS FABRIC SUBSTRATE TO BETWEEN 30 AND ABOUT 100 MICRONS.
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) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |