US2768943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace for continuously distilling bituminous coal
Assignee: Individual
•
Filing: 1953-12-31
•
Granted: 1956-10-30
•
Expires: 1973-12-31
Abstract
No abstract record available.
Inventors
- 👤 Vries Herman Doederus De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:25
CPC Classifications
C; C10; C10B; C10B7/00; C10B7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A FURNACE FOR THE CONTINUOUS DISTILLATION OF BITUMINOUS COAL WHICH TENDS TO SWELL GREATLY WHEN HEATED COMPRISING TWO HORIZONTALLY DISPOSED PARALLEL SUPERPOSED TUBES HAVING A COMMON WALL THEREBETWEEN, SAID COMMON WALL BEING FORMED WITH A PLURALITY OF APERTURES SPACED ALONG THE LENGTH THEREOF, MEANS MOVABLE WITHIN SAID APERTURES FOR MAINTAINING SAID APERTURES IN UNOBSTRUCTED CONDITION, MEANS TO SUPPLY BITUMINOUS COAL TO ONE END OF THE LOWER OF SAID SUPERPOSED TUBES, MEANS TO CONVEY SAID BITUMINOUS COAL THROUGH SAID LOWER TUBE, MEANS TO HEAT SAID TUBES, GAS DISCHARGE MEANS IN COMMUNICATION WITH THE UPPER OF SAID SUPERPOSED TUBES AND DISCHARGE MEANS FOR SOLIDS COMMUNICATING WITH TEH DISCHARGE END OF SAID LOWER TUBE.
Claim 2
Dependent Claim
111 words
A FURNACE FOR THE CONTINUOUS DISTILLATION OF BITUMINOUS COAL WHICH TENDS TO SWELL GREATLY WHEN HEATED COMPRISING TWO HORIZONTALLY DISPOSED PARALLEL SUPERPOSED TUBES HAVING A COMMON WALL THEREBETWEEN, SAID COMMON WALL BEING FORMED WITH A PLURALITY OF APERTURES SPACED ALONG THE LENGTH THEREOF, MEANS MOVABLE WITHIN SAID APERTURES FOR MAINTAINING SAID APERTURES IN UNOBSTRUCTED CONDITION, MEANS TO SUPPLY BITUMINOUS COAL TO ONE END OF THE LOWER OF SAID SUPERPOSED TUBES, MEANS TO CONVEY SAID BITUMINOUS COAL THROUGH SAID LOWER TUBE, MEANS TO HEAT SAID TUBES, GAS DISCHARGE MEANS IN COMMUNICATION WITH THE UPPER OF SAID SUPERPOSED TUBES AND DISCHARGE MEANS FOR SOLIDS COMMUNICATING WITH TEH DISCHARGE END OF SAID LOWER TUBE.
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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) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |