US3297481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning and descaling process
Assignee: Purex Corp Ltd
•
Filing: 1961-06-19
•
Granted: 1967-01-10
•
Expires: 1981-06-19
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Newman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:22
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A PROCESS OF CLEANING OF FOREIGN MATTER FROM AN INTERNAL SURFACE OF A PIECE OF EQUIPMENT BY MEANS OF A WATER SOLUBLE CLEANING AGENT, WHICH COMPRISES DISPERSING EXTERNALLY OF SAID PIECE OF EQUIPMENT, SAID AGENT IN A SUBSTANTIALLY CHEMICALLY INACTIVE FORM IN SUPERHEATED STEAM, CONDUCTING THE RESULTING STREAM DISPERSION OF SAID AGENT IN SAID CHEMICALLY INACTIVE FOR TO SAID PIECE OF EQUIPMENT AND INTERIORLY THEREOF TO SAID SURFACE, CONDENSING SAID STREAM DISPERSION ON SAID SURFACE, AND FORMING A CONCENTRATED AQUEOUS SOLUTION OF SAID AGENT IN THE RESULTING STREAM CONDENSATE, IN CONTACT WITH SAID SURFACE.
Claim 2
Dependent Claim
94 words
A PROCESS OF CLEANING OF FOREIGN MATTER FROM AN INTERNAL SURFACE OF A PIECE OF EQUIPMENT BY MEANS OF A WATER SOLUBLE CLEANING AGENT, WHICH COMPRISES DISPERSING EXTERNALLY OF SAID PIECE OF EQUIPMENT, SAID AGENT IN A SUBSTANTIALLY CHEMICALLY INACTIVE FORM IN SUPERHEATED STEAM, CONDUCTING THE RESULTING STREAM DISPERSION OF SAID AGENT IN SAID CHEMICALLY INACTIVE FOR TO SAID PIECE OF EQUIPMENT AND INTERIORLY THEREOF TO SAID SURFACE, CONDENSING SAID STREAM DISPERSION ON SAID SURFACE, AND FORMING A CONCENTRATED AQUEOUS SOLUTION OF SAID AGENT IN THE RESULTING STREAM CONDENSATE, IN CONTACT WITH SAID 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) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |