US3127341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
abeles
Assignee: —
•
Filing: —
•
Granted: 1964-03-31
•
Expires: 1981-03-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:46
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/21; Y; Y10; Y10S; Y10S210/00; Y10S210/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A FILTER ELEMENT COMPRISING AN ANNULUS OF RESIN IMPREGNATED PLEATED PAPER, SAID PAPER CONSISTING OF TWO DIFFERENT DENSITIES TO PROVIDE HIGH AND LOW FLOW RATE SECTIONS, SAID ANNULUS FORMED OF A CONTINUOUS SHEET OF PAPER, SAID PLEATS EXTENDING LONGITUDINALLY OF THE ANNULUS AND
Claim 2
Dependent Claim
43 words
A FILTER ELEMENT COMPRISING AN ANNULUS OF RESIN IMPREGNATED PLEATED PAPER, SAID PAPER CONSISTING OF TWO DIFFERENT DENSITIES TO PROVIDE HIGH AND LOW FLOW RATE SECTIONS, SAID ANNULUS FORMED OF A CONTINUOUS SHEET OF PAPER, SAID PLEATS EXTENDING LONGITUDINALLY OF THE ANNULUS AND
References Cited (Backward Citations)
US1009365A
Cited
US2279423A
Cited
US2395449A
Cited
US2642187A
Cited
US2748949A
Cited
US2850168A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-31 | 1967-09-30 | 1968-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-31 | 1971-09-30 | 1972-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-31 | 1975-09-30 | 1976-03-31 | $7700.00 | Window Closed / Lapsed |