US3280773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory construction
Assignee: Kaiser Aluminum and Chemical Corp
•
Filing: 1964-10-23
•
Granted: 1966-10-25
•
Expires: 1984-10-23
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:50
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/02; F27D1/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
IN A FURNANCE ROOF STRUCTURE WHEREIN THICKER PORTIONS OF THE ROOF FORM RIBS AND LESS THICK PORTIONS OF THE ROOF FORM VALLEYS DISPOSED BETWEEN SAID RIBS, SAID RIBS EXTENDING FROM ONE SIDE OF SAID ROOF TO THE OPPOSITE SIDE, THE IMPROVEMENT COMPRISING UNITARY REFRACTORY CROSS BLOCKS EXTENDING FROM ONE RIB OF THE ROOF TO AN ADJACENT RIB, SAID REFRACTORY BLOCKS BEING SUPPORTED BY SAID RIBS
Claim 2
Dependent Claim
65 words
IN A FURNANCE ROOF STRUCTURE WHEREIN THICKER PORTIONS OF THE ROOF FORM RIBS AND LESS THICK PORTIONS OF THE ROOF FORM VALLEYS DISPOSED BETWEEN SAID RIBS, SAID RIBS EXTENDING FROM ONE SIDE OF SAID ROOF TO THE OPPOSITE SIDE, THE IMPROVEMENT COMPRISING UNITARY REFRACTORY CROSS BLOCKS EXTENDING FROM ONE RIB OF THE ROOF TO AN ADJACENT RIB, SAID REFRACTORY BLOCKS BEING SUPPORTED BY SAID RIBS
References Cited (Backward Citations)
US2264551A
Cited
US2659325A
Cited
US2359619A
Cited
US2717564A
Cited
US2901990A
Cited
FR1194835A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |