US2721149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Art of tin plating
Assignee: Sinclair Refining Co
•
Filing: 1950-05-19
•
Granted: 1955-10-18
•
Expires: 1970-05-19
Abstract
No abstract record available.
Inventors
- 👤 Nelson John Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:20
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/04; C23C2/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1242532A
Cited
US2044210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |