US3137613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibitor and method of using the same
Assignee: Buckman Laboratories Inc
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Filing: 1962-08-13
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Granted: 1964-06-16
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Expires: 1982-08-13
Abstract
No abstract record available.
Inventors
- 👤 Stanley J Buckman
- 👤 John D Pera
- 👤 William P Purcell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:51
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/30; C; C23; C23F; C23F11/00; C23F11/08; C23F11/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A PROCESS FOR THE PRODUCTION OF PAPER IN WHICH AN AQUEOUS FLUID CONTAINING CELLULOSIC PULP AND OTHER PAPERMAKING INGREDIENTS IS CIRCULATED IN CONTACT WITH A FOURDRINIER WIRE CLOTH COMPOSED OF STRANDS OF COPPER CONTAINING ALLOYS THAT ARE NORMALLY SUBJECT TO MECHANICAL WEAR AND CORROSION, WHEREBY THE USEFUL LIFE OF SUCH WIRE MAY BE INCREASED, WHICH COMPRISES ADDING TO AQUEOUS FLUIDS WITH WHICH THE SAID WIRE CLOTH COMES INTO CONTACT A MIXTURE COMPRISING 20 TO 80 PARTS OF AN ALKALIMETAL SALT OF 2-MERCAPTOBENZOTHIAZOLE AND 20 TO 80 PARTS OF AN ALKANOLAMIDE OF AN ALKANOLAMINE CONTAINING FROM 2 TO 6 CARBON ATOMS AND ONE AMINO GROUP AND A NORMAL, MONOBASIC, SATURATED CARBOXYLIC ACID CONTAINING FROM 6 TO 12 CARBON ATOMS IN AN AMOUNT SUFFICIENT TO PROVIDE A CONCENTRATION OF SAID CORROSION INHIBITING COMPOSITION IN SAID AQUEOUS MEDIUM OF AT LEAST 0.5 P.P.M.
Claim 2
Dependent Claim
140 words
A PROCESS FOR THE PRODUCTION OF PAPER IN WHICH AN AQUEOUS FLUID CONTAINING CELLULOSIC PULP AND OTHER PAPERMAKING INGREDIENTS IS CIRCULATED IN CONTACT WITH A FOURDRINIER WIRE CLOTH COMPOSED OF STRANDS OF COPPER CONTAINING ALLOYS THAT ARE NORMALLY SUBJECT TO MECHANICAL WEAR AND CORROSION, WHEREBY THE USEFUL LIFE OF SUCH WIRE MAY BE INCREASED, WHICH COMPRISES ADDING TO AQUEOUS FLUIDS WITH WHICH THE SAID WIRE CLOTH COMES INTO CONTACT A MIXTURE COMPRISING 20 TO 80 PARTS OF AN ALKALIMETAL SALT OF 2-MERCAPTOBENZOTHIAZOLE AND 20 TO 80 PARTS OF AN ALKANOLAMIDE OF AN ALKANOLAMINE CONTAINING FROM 2 TO 6 CARBON ATOMS AND ONE AMINO GROUP AND A NORMAL, MONOBASIC, SATURATED CARBOXYLIC ACID CONTAINING FROM 6 TO 12 CARBON ATOMS IN AN AMOUNT SUFFICIENT TO PROVIDE A CONCENTRATION OF SAID CORROSION INHIBITING COMPOSITION IN SAID AQUEOUS MEDIUM OF AT LEAST 0.5 P.P.M.
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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |