Patent US3129123A successfully refreshed from Google Patents.
US3129123A
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Method and solution for applying a phosphate conversion coating on ferriferous surfaces
Assignee: Henkel Corp
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Filing: 1962-04-04
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Granted: 1964-04-14
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Expires: 1982-04-04
Abstract
No abstract record available.
Inventors
- 👤 Edward A Rodzewich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:34
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/07; C23C22/08; C23C22/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
THE METHOD OF FORMING A PHOSPATE CONVERSION COATING ON A FERRIFEROUS SURFACE WHICH COMPRISES THE FOLLOWING STEPS: (A) APPLYING TO THE SURFACE AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF; (1) ALKALI METAL PHOSPHATE FROM THE CLASS WHICH CONSISTS OF SODIUM, POTASSIUM, AND AMMONIUM MONO AND DIHYDROGEN PHOSPHATES IN COATING PRODUCING CONCENTRATION, (2) FROM 0.05 TO APPROXIMATELY 1 GRAM/LITER OF HYDRAZINE COMPOUND HAVING THE FORMULA:
Claim 2
Independent Claim
63 words
THE METHOD OF FORMING A PHOSPATE CONVERSION COATING ON A FERRIFEROUS SURFACE WHICH COMPRISES THE FOLLOWING STEPS: (A) APPLYING TO THE SURFACE AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF; (1) ALKALI METAL PHOSPHATE FROM THE CLASS WHICH CONSISTS OF SODIUM, POTASSIUM, AND AMMONIUM MONO AND DIHYDROGEN PHOSPHATES IN COATING PRODUCING CONCENTRATION, (2) FROM 0.05 TO APPROXIMATELY 1 GRAM/LITER OF HYDRAZINE COMPOUND HAVING THE FORMULA:
References Cited (Backward Citations)
US2840498A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |