US2785990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of surface treating zinc oxide
Assignee: American Zinc Lead and Smelting Co
•
Filing: 1954-02-08
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Granted: 1957-03-19
•
Expires: 1974-02-08
Abstract
No abstract record available.
Inventors
- 👤 Marvin K Coulter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:31
CPC Classifications
C; C08; C08K; C08K9/00; C08K9/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
IN A METHOD FOR COATING ZINIC OXIDE PARTICLES, THE STEPS OF INTIMATELY MIXING FROM 0.2 TO 1% BY WEIGHT NORMAL OF ZINC PROPIONATE WITH THE ZINC OXIDE AND THEN DRY MILLING AND SCREENING THE MIXTURE AT TEMPERATURES IN THE RANGE 180-240* C. UNTIL THE ZINC OXIDE REACTS CHEMICALLY WITH THE NORMAL ZINC PROPIONATE AND IS COATED SOLELY WITH BASIC ZINC PROPIONATE.
Claim 2
Dependent Claim
61 words
IN A METHOD FOR COATING ZINIC OXIDE PARTICLES, THE STEPS OF INTIMATELY MIXING FROM 0.2 TO 1% BY WEIGHT NORMAL OF ZINC PROPIONATE WITH THE ZINC OXIDE AND THEN DRY MILLING AND SCREENING THE MIXTURE AT TEMPERATURES IN THE RANGE 180-240* C. UNTIL THE ZINC OXIDE REACTS CHEMICALLY WITH THE NORMAL ZINC PROPIONATE AND IS COATED SOLELY WITH BASIC ZINC PROPIONATE.
References Cited (Backward Citations)
US1216182A
Cited
US1979380A
Cited
US2068066A
Cited
US2261104A
Cited
US2303329A
Cited
US2303330A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-18 | 1960-09-17 | 1961-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-18 | 1964-09-17 | 1965-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-18 | 1968-09-17 | 1969-03-19 | $7700.00 | Window Closed / Lapsed |