US3338754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and composition for phosphatizing metals
Assignee: Hooker Chemical Corp
•
Filing: 1962-11-13
•
Granted: 1967-08-29
•
Expires: 1982-11-13
Abstract
No abstract record available.
Inventors
- 👤 William J Vullo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:18
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/02; C23C22/03
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
96 words
A PROCESS FOR PHOSPHATIZING METAL SURFACES WHEREIN THE SURFACE TO BE PHOSPHATIZED IS CONTACTED WITH A SOLUTION COMPRISING A CHLORINATED HYDROCARBON, ORTHOPHOSPHORIC ACID, A SOLUBILIZING AGENT FOR THE PHOSPHORIC ACID AND SMALL AMOUNTS OF WATER, THE IMPROVEMENT WHICH COMPRISES REMOVING SUBSTANTIALLY ALL OF THE WATER FROM THE SOLUTION BY CONTACTING THE SOLUTION WITH A FINELY DIVIDED METAL POWDER AND SEPARATING THE SUSPENDED SOLIDS FROM THE RESULTING SLURRY PRIOR TO BRINGING THE SOLUTION INTO CONTACT WITH THE METAL SURFACE TO BE PHOSPHATIZED, THEREBY OBTAINING AN IMPROVED PHOSPHATE COATING ON THE FIRST METAL SURFACES CONTACTED WITH THE SOLUTION.
Claim 2
Dependent Claim
96 words
A PROCESS FOR PHOSPHATIZING METAL SURFACES WHEREIN THE SURFACE TO BE PHOSPHATIZED IS CONTACTED WITH A SOLUTION COMPRISING A CHLORINATED HYDROCARBON, ORTHOPHOSPHORIC ACID, A SOLUBILIZING AGENT FOR THE PHOSPHORIC ACID AND SMALL AMOUNTS OF WATER, THE IMPROVEMENT WHICH COMPRISES REMOVING SUBSTANTIALLY ALL OF THE WATER FROM THE SOLUTION BY CONTACTING THE SOLUTION WITH A FINELY DIVIDED METAL POWDER AND SEPARATING THE SUSPENDED SOLIDS FROM THE RESULTING SLURRY PRIOR TO BRINGING THE SOLUTION INTO CONTACT WITH THE METAL SURFACE TO BE PHOSPHATIZED, THEREBY OBTAINING AN IMPROVED PHOSPHATE COATING ON THE FIRST METAL SURFACES CONTACTED WITH THE SOLUTION.
Claim 3
Dependent Claim
25 words
A PHOSPHATIZING COMPOSITION COMPRISING A CHLORINATED HYDROCARBON, ORTHOPHOSPHORIC ACID, A SOLUBILIZING AGENT FOR THE PHOSPHORIC ACID AND MINOR AMOUNT OF A FINELY DIVIDED METAL POWDER.
Claim 4
Dependent Claim
25 words
A PHOSPHATIZING COMPOSITION COMPRISING A CHLORINATED HYDROCARBON, ORTHOPHOSPHORIC ACID, A SOLUBILIZING AGENT FOR THE PHOSPHORIC ACID AND MINOR AMOUNT OF A FINELY DIVIDED METAL POWDER.
References Cited (Backward Citations)
US2789070A
Cited
US2986482A
Cited
US3100728A
Cited
US3197345A
Cited
US3051595A
Cited
US3220890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-28 | 1971-02-27 | 1971-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-28 | 1975-02-27 | 1975-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-28 | 1979-02-27 | 1979-08-29 | $7700.00 | Window Closed / Lapsed |