Patent US3283908A successfully refreshed from Google Patents.
US3283908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nodular filter mass of predetermined volume
Assignee: —
•
Filing: —
•
Granted: 1966-11-08
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Expires: 1983-11-08
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:53
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/001; C02F1/003
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
96 words
A FILTER COMPRISING A MASS OF FLUID PERMEABLE AND DISCRETE NODULES DISTORTED TOGETHER UNDER PRESSURE, EACH OF SAID NODULES HAVING A COVERING OF FILTER MATERIAL AND A HARD NUCLEUS, THE SPACE BETWEEN THE NUCLEI OF SAID MASS BEING SUBSTANTIALLY FILLED WITH SAID FILTER MATERIAL DUE TO SAID PRESSURE, THE RATIO OF NODULE DIAMETER TO NUCLEUS DIAMETER BEING IN THE RANGE OF FROM ABOUT 1.2 TO ABOUT 2.0, THE DIAMETER OF SAID NUCLEUS BEING WITHIN THE APPROXIMATE RANGE OF FROM 1/32 TO 2/16 OF AN INCH, AND FLUID PERMEABLE WALL MEANS RETAINING SAID MASS UNDER SAID PRESSURE.
References Cited (Backward Citations)
US3212641A
Cited
US3219194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |