US3202534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and composition for the aftertreatment of phosphate coatings
Assignee: Hoechst AG
•
Filing: 1961-08-28
•
Granted: 1965-08-24
•
Expires: 1981-08-28
Abstract
No abstract record available.
Inventors
- 👤 Duch Eduard
- 👤 Herbst Willy
- 👤 Rochlitz Fritz
- 👤 Scherer Hans
- 👤 Vilcsek Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:08
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/82; C23C22/83; B; B05; B05D; B05D3/00; B05D3/10; B05D3/102; B05D7/00; B05D7/14; B05D7/16; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C09; C09D; C09D143/00; C09D143/02; C09D4/00; C09D4/06; B05D2350/00; B05D2350/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
202 words
A PROCESS FOR IMPROVING THE CORROSION PROTECTION OF PHOSPHATIZED METAL SURFACES, WHICH PROCESS COMPRISES AFTER-TREATING SAID PHOSPHATIZED METAL SURFACES AT A TEMPERATURE FROM ABOUT 4*C. TO ABOUT 70*C. FOR A PERIOD OF FROM ABOUT 3 SECONDS TO ABOUT 3 MINUTES WITH A SOLUTION CONTAINING A TOTAL OF FROM ABOUT 0.008 PERCENT BY WEIGHT TO ABOUT 2 PERCENT BY WEIGHT OF AT LEAST ONE ALKENE PHOSPHONIC ACID SELECTED FROM THE GROUP CONSISTING OF VINYL PHOSPHONIC ACID, PROPENE-2,3-PHOSPHONIC-1-ACID AND PROPENE-1,2-PHOSPHONIC-1-ACID AND OF AT LEAST ONE POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYVINYL, PHOSPHONIC ACID, COPOLYMERS OF VINYL PHOSPHONIC ACID, COPOLYMERS OF AN ACID DERIVATIVE OF VINYL PHOSPHONIC ACID WHICH DERIVATIVE CONTAINS ONLY ONE FREE HYDROXYL GROUP AT THE PHOSPHORUS ATOM PER MONOMER UNIT, POLYACRYLIC ACID, AND A COPOLYMER OF VINYL METHYL ETHER AND MALEIC ANHYDRRIDE, THE COMONOMERIC COMPONENT OF SAIC COPOLYMERS OF VINYL PHOSPHONIC ACID AND OF SAID COPOLYMERS OF SAID ACID DERIVATIVE OF VINYL PHOSPHONIC ACID COMPRISING AT LEAST ONE SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID, ACRYLIC ACID ALKLY ESTERS, METHACRYLIC ACID, VINYL ACETATE, AND ACRYLONITRILE, THE WEIGHT RATIO OF SAID MONOMERIC ALKENE PHOSPHONIC ACID TO SAID POLYMER BEING BETWEEN 98:2 AND 20:80, AND FINALLY DRYING SAID METAL SURFACES.
Claim 2
Dependent Claim
202 words
A PROCESS FOR IMPROVING THE CORROSION PROTECTION OF PHOSPHATIZED METAL SURFACES, WHICH PROCESS COMPRISES AFTER-TREATING SAID PHOSPHATIZED METAL SURFACES AT A TEMPERATURE FROM ABOUT 4*C. TO ABOUT 70*C. FOR A PERIOD OF FROM ABOUT 3 SECONDS TO ABOUT 3 MINUTES WITH A SOLUTION CONTAINING A TOTAL OF FROM ABOUT 0.008 PERCENT BY WEIGHT TO ABOUT 2 PERCENT BY WEIGHT OF AT LEAST ONE ALKENE PHOSPHONIC ACID SELECTED FROM THE GROUP CONSISTING OF VINYL PHOSPHONIC ACID, PROPENE-2,3-PHOSPHONIC-1-ACID AND PROPENE-1,2-PHOSPHONIC-1-ACID AND OF AT LEAST ONE POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYVINYL, PHOSPHONIC ACID, COPOLYMERS OF VINYL PHOSPHONIC ACID, COPOLYMERS OF AN ACID DERIVATIVE OF VINYL PHOSPHONIC ACID WHICH DERIVATIVE CONTAINS ONLY ONE FREE HYDROXYL GROUP AT THE PHOSPHORUS ATOM PER MONOMER UNIT, POLYACRYLIC ACID, AND A COPOLYMER OF VINYL METHYL ETHER AND MALEIC ANHYDRRIDE, THE COMONOMERIC COMPONENT OF SAIC COPOLYMERS OF VINYL PHOSPHONIC ACID AND OF SAID COPOLYMERS OF SAID ACID DERIVATIVE OF VINYL PHOSPHONIC ACID COMPRISING AT LEAST ONE SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID, ACRYLIC ACID ALKLY ESTERS, METHACRYLIC ACID, VINYL ACETATE, AND ACRYLONITRILE, THE WEIGHT RATIO OF SAID MONOMERIC ALKENE PHOSPHONIC ACID TO SAID POLYMER BEING BETWEEN 98:2 AND 20:80, AND FINALLY DRYING SAID METAL SURFACES.
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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |