US2901430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibition
Assignee: GAF Chemicals Corp
•
Filing: 1953-11-06
•
Granted: 1959-08-25
•
Expires: 1973-11-06
Abstract
No abstract record available.
Inventors
- 👤 Max E Chiddix
- 👤 William J Maxcy
- 👤 Robert L Sundberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:31
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/145; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/19; Y10S260/20; Y10S507/00; Y10S507/939; Y10S516/00; Y10S516/01; Y10S516/07
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
90 words
A PROCESS COMPRISING (A) REACTING UNDER AMIDATING CONDITIONS ONE MOLE OF A POLYALKYLENE POLYAMINE WITH TWWO MOLECULAR EQUIVALENTS OF AN UNSATURATED HIGER FATTY ACID COMPOUND TO FORM THE CORRESPONDING ALIPHATIC AMINODIAMIDE, (B) REACTING THE PRODUCT OF STEP A WITH MORE THAN SUFFICENT LOWER ALKYLENE OXIDE OF FROM ABOUT 2 TO 4CARBON ATOMS TO CONDENSE WITH ALL THE REMAINING REPLACEABLE N-HYDROGEN ATOMS THERIN, AND (C) REACTING ONE MOLE OF THE PRODUCT OF STEP B WITH ONE EQUIVALNET TO ONE MOLE OF AN ALKYLATING AGENT TO FORM THE CORRESPONDING QUATERNARY AMMONIUM DERIVATIVE
Claim 2
Dependent Claim
90 words
A PROCESS COMPRISING (A) REACTING UNDER AMIDATING CONDITIONS ONE MOLE OF A POLYALKYLENE POLYAMINE WITH TWWO MOLECULAR EQUIVALENTS OF AN UNSATURATED HIGER FATTY ACID COMPOUND TO FORM THE CORRESPONDING ALIPHATIC AMINODIAMIDE, (B) REACTING THE PRODUCT OF STEP A WITH MORE THAN SUFFICENT LOWER ALKYLENE OXIDE OF FROM ABOUT 2 TO 4CARBON ATOMS TO CONDENSE WITH ALL THE REMAINING REPLACEABLE N-HYDROGEN ATOMS THERIN, AND (C) REACTING ONE MOLE OF THE PRODUCT OF STEP B WITH ONE EQUIVALNET TO ONE MOLE OF AN ALKYLATING AGENT TO FORM THE CORRESPONDING QUATERNARY AMMONIUM DERIVATIVE
Claim 3
Dependent Claim
57 words
A COMPOSITION MADE IN ACCORDANCE WITH THE PROCESS OF CLAIM 1. 13 A METHOD OF INHIBITING THE CORROSION OF FERROUS METAL SURFACES IN CONTACT WITH A COMPOSITION COMPRISING AN OIL AND AN AQUEOUS BRINE SOLUTION WHICH COMPRISES DISPERSING IN SAID COMPOSITON A SMALL AMOUNT SUFFICIENT TO INHIBIT SUCH CORRUSION OF A COMPOSITION AS DEFINED IN CLAIM 6.
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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) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |