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 02:58
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.
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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) | 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 |