Patent US3233253A successfully refreshed from Google Patents.
Patent US3334880A successfully refreshed from Google Patents.
US3334880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot stove having a spherical top
Assignee: Yawata Iron and Steel Co Ltd
•
Filing: 1965-01-25
•
Granted: 1967-08-08
•
Expires: 1985-01-25
Abstract
No abstract record available.
Inventors
- 👤 Nishida Saichi
- 👤 Yoshioka Masao
- 👤 Uchiyama Haruki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:16
CPC Classifications
C; C21; C21B; C21B9/00; C21B9/10; F; F28; F28D; F28D17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A HOT STOVE COMPRISING A CYLINDRICAL BODY PART HAVING AN IRON SHELL AND A REFRACTORY WALL WITHIN THE IRON SHELL, AND A TOP PART CONNECTED TO THE UPPER END OF SAID CYLINDRICAL BODY PART AND HAVING AN IRON SHELL AND A REFRACTORY WALL WITHIN THE IRON SHELL, SAID STOVE TOP PART BEING SPHERICAL IN FORM AND HAVING THE INSIDE SURFACE THEREOF CURVING OUTWARDLY FROM THE UPPER END OF SAID BODY PART TO AN INSIDE DIAMETER IN A PLANE PARALLEL TO THE PLANE OF THE SAID UPPER END OF THE BODY PART.
Claim 2
Dependent Claim
91 words
A HOT STOVE COMPRISING A CYLINDRICAL BODY PART HAVING AN IRON SHELL AND A REFRACTORY WALL WITHIN THE IRON SHELL, AND A TOP PART CONNECTED TO THE UPPER END OF SAID CYLINDRICAL BODY PART AND HAVING AN IRON SHELL AND A REFRACTORY WALL WITHIN THE IRON SHELL, SAID STOVE TOP PART BEING SPHERICAL IN FORM AND HAVING THE INSIDE SURFACE THEREOF CURVING OUTWARDLY FROM THE UPPER END OF SAID BODY PART TO AN INSIDE DIAMETER IN A PLANE PARALLEL TO THE PLANE OF THE SAID UPPER END OF THE BODY PART.
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) | 1970-08-07 | 1971-02-06 | 1971-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-07 | 1975-02-06 | 1975-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-07 | 1979-02-06 | 1979-08-08 | $7700.00 | Window Closed / Lapsed |