US3593498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air drier and filter
Assignee: Individual
•
Filing: 1969-01-21
•
Granted: 1971-07-20
•
Expires: 1989-01-21
Abstract
Abstract An air drier and filter wherein the air enters through a perforated metal filter in the sidewall and at one end of a casing, said air flowing longitudinally of said casing from the perforated metal filter through an annular mass of a desiccating agent to the opposite end of the casing where it passes laterally through a porous metal filter into an annular passage to flow toward the inlet end of the casing where it flows laterally into a heated chamber leading to a center outlet of the casing.
Inventors
- 👤 Albert L Semon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:44
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/26; F; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0405
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
21 words
An air drier and filter as claimed in claim 1, wherein the filter in the casing inlet is of perforated metal.
Claim 2
Dependent Claim
25 words
An air drier and filter as claimed in claim 1, wherein the filter in the outlet of the first annular passage is of porous metal.
Claim 3
Dependent Claim
29 words
An air drier and filter as claimed in claim 1, wherein the communication between the second annular passage and the center passage comprises an annular row of spaced openings.
Claim 4
Dependent Claim
43 words
An air drier and filter as claimed in claim 1, wherein the electric-heating unit is supported at one end in the first end of the casing and the opposite end of the electric-heating unit is spaced from the outlet of the center passage.
Claim 5
Dependent Claim
60 words
An air drier and filter as claimed in claim 1 wherein the casing is provided with an annular row of openings materially smaller than the air inlet and the first passage outlet and adjacent the second end of the casing for expelling moisture in the form of steam from the casing when the drier and filter is regenerated with heat.
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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |