Patent US2928800A successfully refreshed from Google Patents.
US2928800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc plating
Assignee: EIDP Inc
•
Filing: 1957-03-12
•
Granted: 1960-03-15
•
Expires: 1977-03-12
Abstract
No abstract record available.
Inventors
- 👤 Christian J Wernlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:32
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/22; C25D3/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
65 words
THE PROCESS OF PREPARING A ZINC BRIGHTENING AGENT COMPRISING REACTING IN A DILUTE AQUEUOUS SOLUTION, AT LEAST 1% BY WEIGHT OF POLYVINYL ALCOHOL, AND AN AMOUNT OF H2O2 AT LEAST EQUAL TO 8.5% BY WEIGHT OF THE POLYVINYL ALCOHOL PRESENT IN THE REACTION MIXTURE, SAID REACTION BEING CARRIED OUT FOR A TIME SUFFICIENT TO PERMIT THE SUBSTANTIALLY COMPLETE REACTION OF SAID ALCOHOL AND SAID H2O2.
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) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |