Patent US3581554A successfully refreshed from Google Patents.
US3581554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for identifying condensation deposits
Assignee: US Philips Corp
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Filing: 1969-05-20
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Granted: 1971-06-01
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Expires: 1989-05-20
Abstract
Abstract A device for identifying condensation deposits by the measurement of phase transition temperature of deposits on a polished surface having a controllable temperature inside a space traversed by the gas containing the element to be identified. A chamber to contain the gas is formed by the polished surface, a transparent surface arranged parallel to the polished surface and the inner wall of a ring located between the surfaces, means are provided for measuring the temperature of the polished surface so as to determine the transition temperature.
Inventors
- 👤 Rene Lafitte
- 👤 Paul Lecarpentier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:13
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/14; G01N25/142; G01N25/02; G01N25/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
49 words
A device for identifying precipitated condensates as claimed in claim 1 comprising pressure measuring members in said chamber and wherein said means for measuring the temperature of the polished surface comprises a thermoelement provided in the immediate vicinity of the polished surface in a metal support of said surface.
Claim 2
Dependent Claim
34 words
A device as claimed in claim 1 further comprising a coolant duct directed to the metal support of the polished surface for cooling said surface and a light source for illuminating the polished surface.
Claim 3
Dependent Claim
18 words
A device as claimed in claim 1 further comprising an optical observation system orientated towards the polished surface.
Claim 4
Dependent Claim
17 words
A device as claimed in claim 1 wherein the ring is made of elastic material, particularly polytetrafluorethylene.
Claim 5
Dependent Claim
31 words
A device as claimed in claim 1 wherein the second transparent surface is formed by the surface of a planoparallel glass plate or by the flat surface of a planoconvex lens.
Claim 6
Dependent Claim
23 words
A device as claimed in claim 1 wherein the inner volume of the chamber is adjustable by means of a fine-pitch screwing system.
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |