US3045007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for producing hydroxyethylcellulose
Assignee: Rayonier Inc
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Filing: 1959-04-07
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Granted: 1962-07-17
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Expires: 1979-04-07
Abstract
No abstract record available.
Inventors
- 👤 Mitchell Reid Logan
- 👤 Arthur R Albohn
- 👤 Stig G Palmgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:58
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/505; C; C08; C08B; C08B11/00; C08B11/02; C08B11/04; C08B11/08; C08B17/00; C08B17/06; G; G01; G01T; G01T7/00; G01T7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
THE PROCESS FOR PRODUCING HYDORXYETHYLCELLULOSE WHICH COMPRISES SUBSTANTIALLY CONTINUOUSLY PASSING A BED OF FIBROUS PARTICLES OF ALKALI CELLULOSE FIBERS THROUGH A CHAMBER CONTAINING ETHYLENE OXIDE GAS, SUBJECTING THE BED OF FIBROUS PARTICLES TO A PROGRESSIVE FORWARD MOVEMENT, AND SIMLTANEOUSLY WITH SAID PROGRESSIVE FORWARD MOVEMENT REPEATEDLY CAUSING PORTIONS OF THE BED TO RISE AND FALL IN RAPID SUCCESSION WITH RESULTING ENTRAPMENT OF THE ETHYLENE OXIDE GAS IN THE BED AS SAID PORTIONS RISE AND EXPULSION OF THE ENTRAPPED ETHYLENE OXIDE GAS AS SAID PORTIONS FALL, THEREBY CAUSING A PUMPING ACTION WITH RESPECT OT THE ETHYLENE OXIDE GAS WHICH CAUSES SAID GAS TO DEEPLY PENETRATE THE BED AND REACT UNIFORMLY WITH THE FIBROUS PARTICLES THEREOF.
Claim 2
Dependent Claim
113 words
THE PROCESS FOR PRODUCING HYDORXYETHYLCELLULOSE WHICH COMPRISES SUBSTANTIALLY CONTINUOUSLY PASSING A BED OF FIBROUS PARTICLES OF ALKALI CELLULOSE FIBERS THROUGH A CHAMBER CONTAINING ETHYLENE OXIDE GAS, SUBJECTING THE BED OF FIBROUS PARTICLES TO A PROGRESSIVE FORWARD MOVEMENT, AND SIMLTANEOUSLY WITH SAID PROGRESSIVE FORWARD MOVEMENT REPEATEDLY CAUSING PORTIONS OF THE BED TO RISE AND FALL IN RAPID SUCCESSION WITH RESULTING ENTRAPMENT OF THE ETHYLENE OXIDE GAS IN THE BED AS SAID PORTIONS RISE AND EXPULSION OF THE ENTRAPPED ETHYLENE OXIDE GAS AS SAID PORTIONS FALL, THEREBY CAUSING A PUMPING ACTION WITH RESPECT OT THE ETHYLENE OXIDE GAS WHICH CAUSES SAID GAS TO DEEPLY PENETRATE THE BED AND REACT UNIFORMLY WITH THE FIBROUS PARTICLES THEREOF.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-16 | 1966-01-15 | 1966-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-16 | 1970-01-15 | 1970-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-16 | 1974-01-15 | 1974-07-17 | $7700.00 | Window Closed / Lapsed |