US2941862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of zinc oxide
Assignee: New Jersey Zinc Co
•
Filing: 1957-05-22
•
Granted: 1960-06-21
•
Expires: 1977-05-22
Abstract
No abstract record available.
Inventors
- 👤 Howard M Cyr
- 👤 Bradford C Hafford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:22
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/04; C09C1/043; C01; C01P; C01P2004/00; C01P2004/20; C01P2004/60; C01P2004/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
THE METHOD OF DECREASING THE ACIDITY OF AMERICAN PROCESS ZINC OXIDE TO AT LEAST 0.04% (CALCULATED AS SO3) WITHOUT SIGNIFICANT GROWTH OF ITS PARTICLE SIZE WHICH COMPRISES ESTABLISHING A VERTICALLY-DISPOSED BED OF THE ZINC OXIDE PARTICLES IN A TREATING VESSEL, EFFECTING FLUIDIZATION OF THE BED OF ZINC OXIDE BY PASSING A REDUCING GAS UPWARDLY THERETHROUGH AT A VELOCITY OF ABOUT 2 TO 8 FEET PER MINUTE (CALCULATED AT ROOM TEMPERATURE AND PRES-
Claim 2
Independent Claim
72 words
THE METHOD OF DECREASING THE ACIDITY OF AMERICAN PROCESS ZINC OXIDE TO AT LEAST 0.04% (CALCULATED AS SO3) WITHOUT SIGNIFICANT GROWTH OF ITS PARTICLE SIZE WHICH COMPRISES ESTABLISHING A VERTICALLY-DISPOSED BED OF THE ZINC OXIDE PARTICLES IN A TREATING VESSEL, EFFECTING FLUIDIZATION OF THE BED OF ZINC OXIDE BY PASSING A REDUCING GAS UPWARDLY THERETHROUGH AT A VELOCITY OF ABOUT 2 TO 8 FEET PER MINUTE (CALCULATED AT ROOM TEMPERATURE AND PRES-
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) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |