US2573685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Humidostat
Assignee: Individual
•
Filing: 1947-04-15
•
Granted: 1951-11-06
•
Expires: 1967-04-15
Abstract
No abstract record available.
Inventors
- 👤 Welford C Blinn
- 👤 William R Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:59
CPC Classifications
G; G01; G01N; G01N19/00; G01N19/10; Y; Y10; Y10T; Y10T428/00; Y10T428/26
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
88 words
A FLEXIBLE LAMINATED HYGROSCOPIC ELEMENT, FIXED AT ONE END AND ADAPTED TO MOVE AT ITS OPPOSITE END IN RESPONSE TO CHANGES IN HUMIDITY, CONSISTING OF A FIRST DIMENSIONALLY STABILIZED NARROW STRIP OF ETHYL CELLULOSE CONTAINING SUBSTANTIALLY NO FUGITIVE PLASTICIZERS, AND A SECOND STRIP OF SUBSTANTIALLY NONHYDROGROSCOPIC PLASTIC DIMENSIONALLY SIMILAR TO SAID FIRST TRIP AND SECURED THERETO IN FACE TO FACE RELATION, SAID SECOND STRIP BEING MADE OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYVINYL CHLORIDE, POLYMERIZED VINYLIDENE CHLORIDE, POLYSTYRENE, AND COPOLYMER OF VINYL ACETATE AND CHLORIDE.
References Cited (Backward Citations)
US1293527A
Cited
US1627935A
Cited
US1920502A
Cited
US1846230A
Cited
US2093767A
Cited
US2286710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-05 | 1955-05-07 | 1955-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-05 | 1959-05-07 | 1959-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-05 | 1963-05-07 | 1963-11-06 | $7700.00 | Window Closed / Lapsed |