US2954329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Eduction apparatus
Assignee: Union Oil Company of California
•
Filing: 1958-06-19
•
Granted: 1960-09-27
•
Expires: 1978-06-19
Abstract
No abstract record available.
Inventors
- 👤 Roland O Dhondt
- 👤 Charles J Welsh
- 👤 Ghahremani Kamaleddin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:25
CPC Classifications
C; C10; C10B; C10B7/00; C10G; C10G1/00; C10G1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
IN AN APPARATUS COMPRISING A KILN, MEANS FOR PASSING SOLIDS UPWARDLY THROUGH SAID KILN WHILE MAINTAINING COMBUSTION THEREIN AND MEANS FOR REMOVING HOT ASH FROM THE TOP OF SAID KILN, THE IMPROVEMENT IN SAID LATTER MEANS WHICH COMPRISES A CONTINUOUS SOLIDS SCRAPER BLADE OF HELICAL FORM OPERATIVE ON ASH SOLIDS FROM AN ELEVATED CENTRAL AREA OF SAID RETORT TOP TO A CIRCUMFERENTIAL AREA OF SAID RETORT TOP, SAID SCRAPER BLADE PIVOTED FROM A POINT ON THE EXTENDED CENTERLINE OF SAID KILN AT A SUBSTANTIAL DISTANCE ABOVE THE UPPER EDGE OF SAID KILN AND MOTIVE MEANS FOR OPERATING SAID BLADE.
Claim 2
Dependent Claim
99 words
IN AN APPARATUS COMPRISING A KILN, MEANS FOR PASSING SOLIDS UPWARDLY THROUGH SAID KILN WHILE MAINTAINING COMBUSTION THEREIN AND MEANS FOR REMOVING HOT ASH FROM THE TOP OF SAID KILN, THE IMPROVEMENT IN SAID LATTER MEANS WHICH COMPRISES A CONTINUOUS SOLIDS SCRAPER BLADE OF HELICAL FORM OPERATIVE ON ASH SOLIDS FROM AN ELEVATED CENTRAL AREA OF SAID RETORT TOP TO A CIRCUMFERENTIAL AREA OF SAID RETORT TOP, SAID SCRAPER BLADE PIVOTED FROM A POINT ON THE EXTENDED CENTERLINE OF SAID KILN AT A SUBSTANTIAL DISTANCE ABOVE THE UPPER EDGE OF SAID KILN AND MOTIVE MEANS FOR OPERATING SAID BLADE.
References Cited (Backward Citations)
US1551689A
Cited
US2119937A
Cited
US2501153A
Cited
US2640019A
Cited
US2640014A
Cited
US2750038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-27 | 1964-03-28 | 1964-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-27 | 1968-03-28 | 1968-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-27 | 1972-03-28 | 1972-09-27 | $7700.00 | Window Closed / Lapsed |