US3816074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for disinfecting an area with formaldehyde
Assignee: Detec SA
•
Filing: 1973-06-18
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Granted: 1974-06-11
•
Expires: 1993-06-18
Abstract
Abstract Method and apparatus for disinfecting an area with formaldehyde using a combination of heating the area and adjusting the humidity to certain controlled conditions before releasing the formaldehyde in the area. After a predetermined period the formaldehyde vapour in the area is neutralized with ammonia vapour.
Inventors
- 👤 J Decupper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:28
CPC Classifications
A; A61; A61L; A61L2/00; A61L2/16; A61L2/20; A61L2/204; A61L2/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
67 words
An apparatus as claimed in claim 1, comprising another vertical wall extending through one of the compartments and hermetically separating therein first and second chambers accommodating, respectively, the ammonia and the humidifying means, second auxiliary heating means for evaporating ammonia, the circuit supplying a signal for actuating the second auxiliary heating means at the end of a given period from deactivation of the first auxiliary heating means.
References Cited (Backward Citations)
US558258A
Cited
US728221A
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US961721A
Cited
US1114880A
Cited
US3576593A
Cited
GB1291672A
Cited
US3703353A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |