US2883344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foam detection and control
Assignee: Armstrong World Industries Inc
•
Filing: 1956-04-11
•
Granted: 1959-04-21
•
Expires: 1976-04-11
Abstract
No abstract record available.
Inventors
- 👤 Paul V Mckinney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:45
CPC Classifications
G; G01; G01N; G01N33/00; Y; Y10; Y10T; Y10T137/00; Y10T137/7287
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
THE METHOD OF DETECTING THE APPEARANCE OF FOAM ON THE SURFACE OF LIQUID IN A VESSEL AT A TEMPERATURE OTHER THAN AMBIENT TEMPERATURE, WHICH METHOD COMPRISES MEASURING THE TEMPERATURE OF AT LEAST ONE POSITION IN SAID VESSEL ABOVE THE SURFACE OF SAID LIQUID IN THE ABSENCE OF FOAM ON SAID LIQUID SURFACE AND DETERMINING A CHANGE IN SAID TEMPERATURE NOT CAUSED BY A TEMPERATURE CHANGE IN SAID LIQUID, WHICH CHANGE IN TEMPERATURE INDICATES THE APPEARANCE OF FOAM ON SAID LIQUID SURFACE.
Claim 2
Independent Claim
81 words
THE METHOD OF DETECTING THE APPEARANCE OF FOAM ON THE SURFACE OF LIQUID IN A VESSEL AT A TEMPERATURE OTHER THAN AMBIENT TEMPERATURE, WHICH METHOD COMPRISES MEASURING THE TEMPERATURE OF AT LEAST ONE POSITION IN SAID VESSEL ABOVE THE SURFACE OF SAID LIQUID IN THE ABSENCE OF FOAM ON SAID LIQUID SURFACE AND DETERMINING A CHANGE IN SAID TEMPERATURE NOT CAUSED BY A TEMPERATURE CHANGE IN SAID LIQUID, WHICH CHANGE IN TEMPERATURE INDICATES THE APPEARANCE OF FOAM ON SAID LIQUID SURFACE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |