US3333988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphate coating process
Assignee: Henkel Corp
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Filing: —
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Granted: 1967-08-01
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Expires: 1984-08-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:44
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/07; C23C22/08; C23C22/12; C23C22/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A METHOD FOR MAINTAINING THE COATING PRODUCING QUALITY OF A CHLORATE ACCELERATED ZINC PHOSPHATING COATING SOLUTION OF THE TYPE USED TO APPLY A PHOSPHATE COATING TO SURFACES FROM THE GROUP CONSISTING OF FERRIFEROUS AND ZINCIFEROUS SURFACES COMPRISING ADDING CHLORATE AND ZINC ACID PHOSPHATE TO SAID COATING SOLUTION IN AMOUNTS SUFFICIENT TO REPLENISH THE DEPLETION OF CHLORATE AND ZINC ACID PHOSPHATE OCCURING DURING THE COURSE OF USE OF SAID SOLUTION, AND ADDING NITRITE TO SAID COATING SOLUTION IN AMOUNTS SUFFICIENT TO ESTABLISH AND MAINTAIN A CONCENTRATION OF NITRITE THEREIN OF AT LEAST 0.03 GRAM/LITER CALCULATED AS NO2 DURING THE COURSE OF USE OF SAID SOLUTION.
Claim 2
Independent Claim
104 words
A METHOD FOR MAINTAINING THE COATING PRODUCING QUALITY OF A CHLORATE ACCELERATED ZINC PHOSPHATING COATING SOLUTION OF THE TYPE USED TO APPLY A PHOSPHATE COATING TO SURFACES FROM THE GROUP CONSISTING OF FERRIFEROUS AND ZINCIFEROUS SURFACES COMPRISING ADDING CHLORATE AND ZINC ACID PHOSPHATE TO SAID COATING SOLUTION IN AMOUNTS SUFFICIENT TO REPLENISH THE DEPLETION OF CHLORATE AND ZINC ACID PHOSPHATE OCCURING DURING THE COURSE OF USE OF SAID SOLUTION, AND ADDING NITRITE TO SAID COATING SOLUTION IN AMOUNTS SUFFICIENT TO ESTABLISH AND MAINTAIN A CONCENTRATION OF NITRITE THEREIN OF AT LEAST 0.03 GRAM/LITER CALCULATED AS NO2 DURING THE COURSE OF USE OF SAID SOLUTION.
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) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |