US3499418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous metallic strip hot-dip metal coating apparatus
Assignee: National Steel Corp
•
Filing: 1966-12-01
•
Granted: 1970-03-10
•
Expires: 1986-12-01
Abstract
No abstract record available.
Inventors
- 👤 John T Mayhew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:52
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/14; C23C2/16; C23C2/18; C23C2/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US287076A
Cited
US811854A
Cited
US1672526A
Cited
US2160864A
Cited
US2390007A
Cited
US2950991A
Cited
US3148080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |