US3281904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stopper for a ladle or similar receptacle
Assignee: Vesuvius Crucible Co
•
Filing: 1958-09-08
•
Granted: 1966-11-01
•
Expires: 1978-09-08
Abstract
No abstract record available.
Inventors
- 👤 Crawford B Murton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:17
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/14; B22D41/16; F; F27; F27D; F27D3/00; F27D3/15; F27D3/1509; F27D3/1536
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A STOPPER FOR A LADLE OR SIMILAR RECEPTACLE COMPRISING A REFRACTORY HEAD HAVING A WELL EXTENDING DOWNWARDLY THEREINTO, A ROD HAVING A LATERAL PROJECTION AT ITS BOTTOM INSERTED DOWNWARDLY INTO THE WELL, THE WELL BEING INTERNALLY THREADED, AND EXTERNALLY THREADED MEANS THREADED INTO THE WELL INTO POSITION TO OVERLIE AT LEAST A PORTION OF
Claim 2
Dependent Claim
54 words
A STOPPER FOR A LADLE OR SIMILAR RECEPTACLE COMPRISING A REFRACTORY HEAD HAVING A WELL EXTENDING DOWNWARDLY THEREINTO, A ROD HAVING A LATERAL PROJECTION AT ITS BOTTOM INSERTED DOWNWARDLY INTO THE WELL, THE WELL BEING INTERNALLY THREADED, AND EXTERNALLY THREADED MEANS THREADED INTO THE WELL INTO POSITION TO OVERLIE AT LEAST A PORTION OF
References Cited (Backward Citations)
US2336518A
Cited
US712111A
Cited
GB190412291A
Cited
US1719795A
Cited
US1843175A
Cited
US1825177A
Cited
US2556152A
Cited
US2599832A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |