Patent US3957932A successfully refreshed from Google Patents.
US3957932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Humidifier
Assignee: American Air Filter Co Inc
•
Filing: 1974-11-26
•
Granted: 1976-05-18
•
Expires: 1994-11-26
Abstract
Abstract Humidifier for humidifying air utilizing a shallow pan of high surface area with a plurality of wells of relatively deep, but small cross-sectional area therein with heating elements disposed within said wells whereby upon heating liquid in the wells, heat is transferred rapidly to the remaining liquid in the shallow pan, the liquid being brought to vaporizing temperature quite rapidly.
Inventors
- 👤 Robert L. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:51
CPC Classifications
F; F24; F24F; F24F6/00; F24F6/02; F24F6/025; Y; Y10; Y10S; Y10S148/00; Y10S148/006; Y10S261/00; Y10S261/15
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
71 words
A humidifying device comprising an elongated pan with a bottom and a plurality of relatively short sides, said bottom having a plurality of openings therein, each opening being in communication with upwardly extending side walls of an elongated chamber, said side walls being longer than said short sides of said pan, said chamber having the same cross-sectional area as said opening; and, each chamber having disposed therein an elongated heating element.
Claim 2
Dependent Claim
71 words
A humidifying device comprising an elongated pan with a bottom and a plurality of relatively short sides, said bottom having a plurality of openings therein, each opening being in communication with upwardly extending side walls of an elongated chamber, said side walls being longer than said short sides of said pan, said chamber having the same cross-sectional area as said opening; and, each chamber having disposed therein an elongated heating element.
Claim 3
Dependent Claim
21 words
The humidifying device of Claim 1 wherein said elongated heating elements are at least two-thirds of the length of each chamber.
Claim 4
Dependent Claim
18 words
The humidifying device of claim 1 wherein said elongated heating elements are in axial alignment with said openings.
Claim 5
Dependent Claim
33 words
The humidifying device of claim 1 wherein the ratio of the cross-sectional area to volume of the pan to the cross-sectional area to volume of the chamber is at least 3.35 to 1.
Claim 6
Dependent Claim
32 words
The humidifying device of claim 1 wherein the elongated pan is disposed within an air duct whereby air flows across the top of the pan entraining the vapor evaporating from said pan.
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) | 1979-05-18 | 1979-11-17 | 1980-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-18 | 1983-11-17 | 1984-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-18 | 1987-11-17 | 1988-05-18 | $7700.00 | Window Closed / Lapsed |