US3409470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclic water hammer method
Assignee: Dow Chemical Co
•
Filing: 1966-06-27
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Granted: 1968-11-05
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Expires: 1986-06-27
Abstract
No abstract record available.
Inventors
- 👤 Karpovich John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:53
CPC Classifications
F; F28; F28G; F28G7/00; B; B01; B01F; B01F35/00; B01F35/10; B01F35/145; B01F35/1452
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A METHOD OF REMOVING MATERIAL ADHERING TO A SURFACE PART OF AN ENCLOSED VESSEL WHICH IS ADAPTED TO BE PRESSURIZED, SAID VESSEL HAVING SPACED APART INLET AND OUTLET MEANS FOR PASSING LIQUID BASE FLOW MATERIAL OVER SAID SURFACE PART, COMPRISING FLOWING LIQUID WHICH IS UNDER PRESSURE ALONG SAID SURFACE PART, HEATING SAID SURFACE PART TO BE CLEANED TO ABOVE THE BOILING TEMPERATURE OF SAID FLOWING LIQUID UNDER TENSILE STRESS CONDITIONS, AND THEN SUDDENLY INTERRUPTING THE FLOW OF LIQUID AT SAID INLET MEANS THUS PLACING SAID LIQUID UNDER TENSION WHEREBY BOILING OCCURS AT SAID SURFACE PART.
Claim 2
Independent Claim
95 words
A METHOD OF REMOVING MATERIAL ADHERING TO A SURFACE PART OF AN ENCLOSED VESSEL WHICH IS ADAPTED TO BE PRESSURIZED, SAID VESSEL HAVING SPACED APART INLET AND OUTLET MEANS FOR PASSING LIQUID BASE FLOW MATERIAL OVER SAID SURFACE PART, COMPRISING FLOWING LIQUID WHICH IS UNDER PRESSURE ALONG SAID SURFACE PART, HEATING SAID SURFACE PART TO BE CLEANED TO ABOVE THE BOILING TEMPERATURE OF SAID FLOWING LIQUID UNDER TENSILE STRESS CONDITIONS, AND THEN SUDDENLY INTERRUPTING THE FLOW OF LIQUID AT SAID INLET MEANS THUS PLACING SAID LIQUID UNDER TENSION WHEREBY BOILING OCCURS AT SAID SURFACE PART.
References Cited (Backward Citations)
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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) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |