Patent US3200004A successfully refreshed from Google Patents.
US3200004A
Expired / Lapsed
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Process for the after-treatment of phosphate coatings
Assignee: Hoechst AG
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Filing: 1962-08-28
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Granted: 1965-08-10
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Expires: 1982-08-28
Abstract
No abstract record available.
Inventors
- 👤 Herbst Willy
- 👤 Rochlitz Fritz
- 👤 Vilcsek Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:23
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/167; C23F11/1676; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3826; C08; C08F; C08F30/00; C08F30/02; C23C; C23C22/00; C23C22/82; C23C22/83
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A PROCESS FOR IMPROVING THE CORRIOSION PROTECTION OF PHOSPHATIZED METAL SURFACES, WHICH PROCESS COMPRISES AFTER-TREATING SAID PHOSPHATIZED METAL SURFACES WITH A SOLUTION CONTAINING FROM ABOUT 0.08 PERCENT TO ABOUT 2 PERCENT BY WEIGHT OF AN ALKENE PHOSPHONIC ACID HAVING 2 TO 3 CARBON ATOMS IN AT LEAST ONE SOLVENT SELECTED FROM THE GROUP CONSISTING OF WATER AND ALIPHATIC ALCOHOLS HAVING 1 TO 4 CARBON ATOMS, AND THEN DRYING THE TREATED SURFACE.
Claim 2
Dependent Claim
71 words
A PROCESS FOR IMPROVING THE CORRIOSION PROTECTION OF PHOSPHATIZED METAL SURFACES, WHICH PROCESS COMPRISES AFTER-TREATING SAID PHOSPHATIZED METAL SURFACES WITH A SOLUTION CONTAINING FROM ABOUT 0.08 PERCENT TO ABOUT 2 PERCENT BY WEIGHT OF AN ALKENE PHOSPHONIC ACID HAVING 2 TO 3 CARBON ATOMS IN AT LEAST ONE SOLVENT SELECTED FROM THE GROUP CONSISTING OF WATER AND ALIPHATIC ALCOHOLS HAVING 1 TO 4 CARBON ATOMS, AND THEN DRYING THE TREATED SURFACE.
References Cited (Backward Citations)
US2885312A
Cited
US3012917A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |