Patent US3503597A successfully refreshed from Google Patents.
US3503597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal treating device
Assignee: MEEHANITE WORLDWIDE Corp
•
Filing: 1967-02-20
•
Granted: 1970-03-31
•
Expires: 1987-02-20
Abstract
No abstract record available.
Inventors
- 👤 Harry H Kessler
- 👤 William H Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:43
CPC Classifications
B; B22; B22D; B22D1/00; B22D1/002; B22D1/005
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1973-03-30 | 1973-09-29 | 1974-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-30 | 1977-09-29 | 1978-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-30 | 1981-09-29 | 1982-03-31 | $7700.00 | Window Closed / Lapsed |