US2469015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and compositions for producing surface conversion coatings on zinc
Assignee: United Chromium Inc
•
Filing: 1943-02-20
•
Granted: 1949-05-03
•
Expires: 1963-02-20
Abstract
No abstract record available.
Inventors
- 👤 Jesse E Stareck
- 👤 Lester M Corliss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:14
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/38; C25D11/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1853323A
Cited
US1942469A
Cited
US2042611A
Cited
US2021592A
Cited
US1954000A
Cited
US1953999A
Cited
US2091386A
Cited
US2177392A
Cited
US2106904A
Cited
US2206028A
Cited
US2224528A
Cited
US2322205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-02 | 1952-11-01 | 1953-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-02 | 1956-11-01 | 1957-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-02 | 1960-11-01 | 1961-05-03 | $7700.00 | Window Closed / Lapsed |