US3332854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent recovery by charcoal adsorption and steam desorption
Assignee: Individual
•
Filing: 1964-10-23
•
Granted: 1967-07-25
•
Expires: 1984-10-23
Abstract
No abstract record available.
Inventors
- 👤 Duckstein Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:59
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/0407; B01D53/0438; C; C01; C01B; C01B32/00; C01B32/30; C01B32/354; C01B32/36; B01D2253/00; B01D2253/10; B01D2253/102; B01D2257/00; B01D2257/20; B01D2257/206; B01D2257/2064; B01D2258/00; B01D2258/06; B01D2259/00; B01D2259/40; B01D2259/40083; B01D2259/40088; B01D2259/4009; B01D53/0462; Y; Y02; Y02P; Y02P20/00; Y02P20/151
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
AN APPARATUS FOR RECOVERING SOLVENTS SUCH AS PERCHLOROETHYLENE AND TRICHLOROETHYLENE BY ADSORPTION ON ACTIVATED CHARCOAL AND DESORPTION BY FLUSHING WITH STEAM, SAID APPARATUS COMPRISING MEANS DEFINING A CHAMBER CONTAINING ACTIVATED CHARCOAL INCLUDING A CHARCOAL CARRIER SIEVE, A FIRST GAS CONDUIT MEANS LOCATED ON ONE SIDE OF SAID CHAMBER AND COMMUNICATING THEREWITH AND A SECOND GAS CONDUIT MEANS LOCATED ON AN OPPOSITE SIDE OF SAID CHAMBER AND COMMUNICATING THEREWITH, AN EVAPORATION VESSEL OPENED AT ITS TOP FACING SAID CARRIER SIEVE AND HAVING GAS FLOW COMMUNICATION THERE WITH, A STREAM GENERATOR HEATER POSITIONED IN SAID VESSEL, SUPERHEATING MEANS POSITIONED BELOW SAID SIEVE AND ABOVE SAID STEAM GENERATOR HEATER, AND INTERCEPTION MEANS POSITIONED BETWEEN SAID STEAM GENERATOR HEATER AND SAID SIEVE ABOVE SAID SUPER HEATING MEANS TO INTERCEPT MATERIALS PASSING DOWNWARDLY FROM SAID CHAMBER TOWARD SAID HEATER.
Claim 2
Independent Claim
134 words
AN APPARATUS FOR RECOVERING SOLVENTS SUCH AS PERCHLOROETHYLENE AND TRICHLOROETHYLENE BY ADSORPTION ON ACTIVATED CHARCOAL AND DESORPTION BY FLUSHING WITH STEAM, SAID APPARATUS COMPRISING MEANS DEFINING A CHAMBER CONTAINING ACTIVATED CHARCOAL INCLUDING A CHARCOAL CARRIER SIEVE, A FIRST GAS CONDUIT MEANS LOCATED ON ONE SIDE OF SAID CHAMBER AND COMMUNICATING THEREWITH AND A SECOND GAS CONDUIT MEANS LOCATED ON AN OPPOSITE SIDE OF SAID CHAMBER AND COMMUNICATING THEREWITH, AN EVAPORATION VESSEL OPENED AT ITS TOP FACING SAID CARRIER SIEVE AND HAVING GAS FLOW COMMUNICATION THERE WITH, A STREAM GENERATOR HEATER POSITIONED IN SAID VESSEL, SUPERHEATING MEANS POSITIONED BELOW SAID SIEVE AND ABOVE SAID STEAM GENERATOR HEATER, AND INTERCEPTION MEANS POSITIONED BETWEEN SAID STEAM GENERATOR HEATER AND SAID SIEVE ABOVE SAID SUPER HEATING MEANS TO INTERCEPT MATERIALS PASSING DOWNWARDLY FROM SAID CHAMBER TOWARD SAID HEATER.
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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) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |