US3500029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charge computer for basic oxygen furnace
Assignee: Leeds and Northrup Co
•
Filing: 1967-08-17
•
Granted: 1970-03-10
•
Expires: 1987-08-17
Abstract
No abstract record available.
Inventors
- 👤 John W Schwartzenberg
- 👤 Frank C Luxl
- 👤 Bernard Blum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:07
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/48; G06G7/75
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3100699A
Cited
US3181343A
Cited
US3218158A
Cited
US3346250A
Cited
US3329495A
Cited
US3409764A
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 |