US3272650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for cleaning conduits
Assignee: Elkem Metals Co LP
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Filing: 1963-02-21
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Granted: 1966-09-13
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Expires: 1983-02-21
Abstract
No abstract record available.
Inventors
- 👤 Russell L Macvittie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:51
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/032; B08B9/04; B08B9/053; B08B9/057; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
A PROCESS FOR CLEANING ADHERING DEPOSITS FROM THE INTERIOR SURFACE OF A CONDUIT, SAID PROCESS COMPRISING PREPARING A SUSPENSION CONSISTING ESSENTIALLY OF WATER AND IRREGULARLY SHAPED PARTICLES HAVING SHARP CORNERS AT SURFACE INTERSECTIONS, SAID PARTICLES BEING OF AN ORGANIC MATERIAL CHOSEN FROM THE GROUP CONSISTING OF STYRENEACRYLONITRILE COPOLYMERS CONTAINING 10 TO 30 PERCENT ACRYLONITRILE, METHYL METHACRYLATES, POLYCARBONATES AND NYLONS, THE RATIO OF PARTICLES TO WATER BEING IN THE RANGE OF 0.4 TO 0.6 POUND PER GALLON AND SAID PARTICLES AND SAID WATER BEING RESPECTIVELY INERT TO ONE ANOTHER AND MUTUALLY INSOLUBLE; SAID PARTICLES BEING FURTHER CHARACTERIZED BY HAVING A DENSITY OF BETWEEN 80 PERCENT AND 120 PERCENT OF SAID WATER, A HARDNESS WITHIN THE RANGE OF 60 TO 120 ROCKWELL M AND A SIZE IN THE RANGE OF FROM 1/10 TO 1.30 OF THE INTERNAL DIAMETER OF SAID CONDUIT TO BE CLEANED; AND PASSING SAID SUSPENSION THROUGH THE INTERIOR OF SAID CONDUIT TO BE CLEANED AT A LINEAL VELOCITY SUFFICIENT TO PROVIDE TURBULENT FLOW IN SAID CONDUIT, AND FOR A TIME SUFFICIENT TO REMOVE SAID ADHERENT DEPOSITS.
Claim 2
Dependent Claim
177 words
A PROCESS FOR CLEANING ADHERING DEPOSITS FROM THE INTERIOR SURFACE OF A CONDUIT, SAID PROCESS COMPRISING PREPARING A SUSPENSION CONSISTING ESSENTIALLY OF WATER AND IRREGULARLY SHAPED PARTICLES HAVING SHARP CORNERS AT SURFACE INTERSECTIONS, SAID PARTICLES BEING OF AN ORGANIC MATERIAL CHOSEN FROM THE GROUP CONSISTING OF STYRENEACRYLONITRILE COPOLYMERS CONTAINING 10 TO 30 PERCENT ACRYLONITRILE, METHYL METHACRYLATES, POLYCARBONATES AND NYLONS, THE RATIO OF PARTICLES TO WATER BEING IN THE RANGE OF 0.4 TO 0.6 POUND PER GALLON AND SAID PARTICLES AND SAID WATER BEING RESPECTIVELY INERT TO ONE ANOTHER AND MUTUALLY INSOLUBLE; SAID PARTICLES BEING FURTHER CHARACTERIZED BY HAVING A DENSITY OF BETWEEN 80 PERCENT AND 120 PERCENT OF SAID WATER, A HARDNESS WITHIN THE RANGE OF 60 TO 120 ROCKWELL M AND A SIZE IN THE RANGE OF FROM 1/10 TO 1.30 OF THE INTERNAL DIAMETER OF SAID CONDUIT TO BE CLEANED; AND PASSING SAID SUSPENSION THROUGH THE INTERIOR OF SAID CONDUIT TO BE CLEANED AT A LINEAL VELOCITY SUFFICIENT TO PROVIDE TURBULENT FLOW IN SAID CONDUIT, AND FOR A TIME SUFFICIENT TO REMOVE SAID ADHERENT DEPOSITS.
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |