Patent US3073067A successfully refreshed from Google Patents.
US3073067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal cased refractory brick
Assignee: Harbison Walker Refractories Co
•
Filing: 1958-03-25
•
Granted: 1963-01-15
•
Expires: 1978-03-25
Abstract
No abstract record available.
Inventors
- 👤 Francis P Shonkwiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:03
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/04; F27D1/06; F27D1/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2736187A
Cited
US1252415A
Cited
US2033752A
Cited
US2230823A
Cited
US2125193A
Cited
US2296392A
Cited
US2454922A
Cited
US2915893A
Cited
US2853872A
Cited
US2829877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |