US2987428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal coating composition and method of coating steel
Assignee: Henkel Corp
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Filing: 1958-03-14
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Granted: 1961-06-06
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Expires: 1978-03-14
Abstract
No abstract record available.
Inventors
- 👤 Ferdinand P Heller
- 👤 Roger L Beamon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:39
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/07; C23C22/23
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
88 words
THE METHOD OF COATING STEEL WHICH COMPRISES TREATING ITS SURFACE WITH AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF THE FOLLOWING: QUANTITY PYROPHOSPHATE FROM THE CLASS CONSISTING OF SODIUM, POTASSIUM, AMMONIUM AND LITHIUM PYROPHOSPHATES FROM 0.05% TO 13% BY WEIGHT. FERRIC ION FROM 0.0008 PART FOR EACH PART OF PYROPHOSPHATE CALCULATED AS P2O7 TO SATURATION OF THE BATH. QUANTITY ACCELERATING AGENT FROM THE CLASS WHICH CONSISTS OF CHLORATES, NITRIES AND PEROXYGEN COMPOUNDS EQUIVALENT IN EFFECT TO FROM 0.2 GRAM TO 10 GRAMS OF CHLORATE PER 100 MLS. OF COATING SOLUTION.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |