US2658865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coke oven doorframe
Assignee: Individual
•
Filing: 1949-11-09
•
Granted: 1953-11-10
•
Expires: 1969-11-09
Abstract
No abstract record available.
Inventors
- 👤 Wolff Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:52
CPC Classifications
C; C10; C10B; C10B25/00; C10B25/02; C10B25/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A METALLIC ONE PIECE, DOOR FRAME FOR USE IN SURROUNDING A DOORWAY AT THE END OF A HORIZONTAL COKING CHAMBER AND COMPRISING VERTICAL PORTIONS AT THE SIDES OF THE DOORWAY AND TRANSVERSE PORTIONS AT THE TOP AND BOTTOM OF SAID DOORWAY, SAID VERTICAL PORTIONS, BEING BOUNDED BY FOUR VERTICAL SURFACES, OF SUBSTANTIALLY EQUAL WIDTH AND EACH SURFACE BEING CONTINUOUS AND INTERSECTING TWO OTHER OF THE SURFACES SUBSTANTIALLY AT RIGHT ANGLES.
Claim 2
Dependent Claim
70 words
A METALLIC ONE PIECE, DOOR FRAME FOR USE IN SURROUNDING A DOORWAY AT THE END OF A HORIZONTAL COKING CHAMBER AND COMPRISING VERTICAL PORTIONS AT THE SIDES OF THE DOORWAY AND TRANSVERSE PORTIONS AT THE TOP AND BOTTOM OF SAID DOORWAY, SAID VERTICAL PORTIONS, BEING BOUNDED BY FOUR VERTICAL SURFACES, OF SUBSTANTIALLY EQUAL WIDTH AND EACH SURFACE BEING CONTINUOUS AND INTERSECTING TWO OTHER OF THE SURFACES SUBSTANTIALLY AT RIGHT ANGLES.
References Cited (Backward Citations)
US736281A
Cited
US1880600A
Cited
DE615695C
Cited
GB430446A
Cited
US2085775A
Cited
CH227629A
Cited
GB554743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-09 | 1957-05-11 | 1957-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-09 | 1961-05-11 | 1961-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-09 | 1965-05-11 | 1965-11-10 | $7700.00 | Window Closed / Lapsed |