US3102881A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose derivatives and shaped structures thereof
Assignee: EIDP Inc
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Filing: 1960-03-30
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Granted: 1963-09-03
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Expires: 1980-03-30
Abstract
No abstract record available.
Inventors
- 👤 Osborn Robert Otto
- 👤 Porck Alfred Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:06
CPC Classifications
C; C08; C08B; C08B11/00; C08B11/02; C08B11/04; C08B11/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
48 words
AS A NEW COMPOSITION OF MATTER A HYDROXYALKYL ETHER OF CELLULOSE CONTAINING FROM 0.5% TO 15% BY WEIGHT OF HYDROXYALKYL GROUPS CONTAINING FROM 8 TO 20 CARSAID HYDROXYALKYL GROUPS CONTAINING FROM 8 TO 20 CARBON ATOMS, AND SAID CELLULOSE HAVING A DEGREE OF POLY,ERIZATION OF AT LEAST 200.
Claim 2
Dependent Claim
48 words
AS A NEW COMPOSITION OF MATTER A HYDROXYALKYL ETHER OF CELLULOSE CONTAINING FROM 0.5% TO 15% BY WEIGHT OF HYDROXYALKYL GROUPS CONTAINING FROM 8 TO 20 CARSAID HYDROXYALKYL GROUPS CONTAINING FROM 8 TO 20 CARBON ATOMS, AND SAID CELLULOSE HAVING A DEGREE OF POLY,ERIZATION OF AT LEAST 200.
Claim 3
Dependent Claim
53 words
THE PROCESS WHICH COMPRISES REACTING VAPORS OF AN EPOXYALKANE HAVING FROM 8 TO 10 CARBON ATOMS WITH CELLULOSE HAVING A DEGREE OF POLYMERIZATION OF AT LEAST 200 FOR A TIME SUFICIENT TO PRODUCE A REACTION PRODUCT CONTANING FROM 0.5 TO 15% BY WEIGHT OF HYDROXYALKYL GROUPS, BASED ON THE WEIGHT OF THE CELLULOSE.
Claim 4
Dependent Claim
53 words
THE PROCESS WHICH COMPRISES REACTING VAPORS OF AN EPOXYALKANE HAVING FROM 8 TO 10 CARBON ATOMS WITH CELLULOSE HAVING A DEGREE OF POLYMERIZATION OF AT LEAST 200 FOR A TIME SUFICIENT TO PRODUCE A REACTION PRODUCT CONTANING FROM 0.5 TO 15% BY WEIGHT OF HYDROXYALKYL GROUPS, BASED ON THE WEIGHT OF THE CELLULOSE.
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) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |