Patent US3190812A successfully refreshed from Google Patents.
US3190812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the continuous production of hard pitch
Assignee: Rain Carbon Germany GmbH
•
Filing: 1961-01-17
•
Granted: 1965-06-22
•
Expires: 1981-01-17
Abstract
No abstract record available.
Inventors
- 👤 Puls Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:02
CPC Classifications
C; C10; C10C; C10C1/00; C10C1/19; C10C3/00; C10C3/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A DEVICE FOR THE CONTINUOUS PRODUCITION OF HARD PITCH FROM A SOFTER PITCH, PITCH-CONTAINING MATERIALS AND PITCH-FORMING STARTING MATERIALS, ESSENTIALLY CONSISTING OF A TUBE FURNACE AND A PRESSURE VESSEL COMPRISING AT LEAST TWO THERMALLY INSULATED ADJACENT CHAMBERS WHICH RECEIVE NO HEAT SUPPLY AND ARE ARRANGED ONE ABOVE THE OTHER, ADJACENT CHAMBERS BEING CONNECTED BY A TUBE, SAID CHAMBERS RECEIVING FROM SAID TUBE FURNACE HEATED STARTING MATERIAL FLOWING IN DOWNWARD DIRECTION TO THE HIGHEST CHAMBER AND FROM THERE TO ADJACENT CHAMBERS ARRANGED BELOW SAID HIGHEST CHAMBER MEANS FOR ALTERNATELY CLOSING AND OPENING SAID TUBE IN ORDER TO EFFECT ALTERNATE CHARGING AND DISCHARGING THE CHAMBERS AND MEANS FOR EQUALIZING AND DISCHARGING THE CHAMBERS AND MEANS FOR EQUALIZING THE PRESSURE IN SAID CHAMBERS.
Claim 2
Independent Claim
120 words
A DEVICE FOR THE CONTINUOUS PRODUCITION OF HARD PITCH FROM A SOFTER PITCH, PITCH-CONTAINING MATERIALS AND PITCH-FORMING STARTING MATERIALS, ESSENTIALLY CONSISTING OF A TUBE FURNACE AND A PRESSURE VESSEL COMPRISING AT LEAST TWO THERMALLY INSULATED ADJACENT CHAMBERS WHICH RECEIVE NO HEAT SUPPLY AND ARE ARRANGED ONE ABOVE THE OTHER, ADJACENT CHAMBERS BEING CONNECTED BY A TUBE, SAID CHAMBERS RECEIVING FROM SAID TUBE FURNACE HEATED STARTING MATERIAL FLOWING IN DOWNWARD DIRECTION TO THE HIGHEST CHAMBER AND FROM THERE TO ADJACENT CHAMBERS ARRANGED BELOW SAID HIGHEST CHAMBER MEANS FOR ALTERNATELY CLOSING AND OPENING SAID TUBE IN ORDER TO EFFECT ALTERNATE CHARGING AND DISCHARGING THE CHAMBERS AND MEANS FOR EQUALIZING AND DISCHARGING THE CHAMBERS AND MEANS FOR EQUALIZING THE PRESSURE IN SAID CHAMBERS.
References Cited (Backward Citations)
US135673A
Cited
US2032546A
Cited
US1965074A
Cited
US2006188A
Cited
US1980839A
Cited
US2120296A
Cited
US2173984A
Cited
US2326186A
Cited
US2573149A
Cited
US2985577A
Cited
US2937138A
Cited
US2916432A
Cited
US2983665A
Cited
US2967815A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |