Patent US2658865A successfully refreshed from Google Patents.
US2658865A
Expired / Lapsed
US
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Coke oven doorframe
Assignee: Individual
•
Filing: 1949-11-09
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Granted: 1953-11-10
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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 18:00
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)
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Cited
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Cited
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Cited
US2085775A
Cited
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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 |