US3136647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Basic zinc sulfate pigments
Assignee: American Zinc Lead and Smelting Co
•
Filing: 1960-02-15
•
Granted: 1964-06-09
•
Expires: 1980-02-15
Abstract
No abstract record available.
Inventors
- 👤 George R Waitkins
- 👤 John B Crawford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:01
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/04; C01; C01P; C01P2004/00; C01P2004/10; C01P2004/20; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/10; C01P2006/60; C01P2006/80
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
CA547756A
Cited
US1694710A
Cited
US2139995A
Cited
US2180721A
Cited
US2356767A
Cited
US2348883A
Cited
US2313619A
Cited
US2419017A
Cited
US2548048A
Cited
US2785990A
Cited
US2844486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |