US3314809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making thermoplastic shaped articles from hydroxypropyl cellulose having an m.s. of at least 2
Assignee: Hercules LLC
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Filing: 1963-02-08
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Granted: 1967-04-18
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Expires: 1983-02-08
Abstract
No abstract record available.
Inventors
- 👤 Eugene D Klug
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:22
CPC Classifications
C; C08; C08B; C08B11/00; C08B11/20; C08B1/00; C08B1/08; C08B11/02; C08B11/04; C08B11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
PROCESS OF PREPARING ARTICLES OF MANUFACTURE OF ANY DESIRED SHAPE WHICH COMPRISES SUBJECTING HYDROXYPROPYL CELLULOSE TO A TEMPERATURE OF ABOUT 80*C.-250*C. AND A PRESSURE OF ABOUT 50-25,000 POUNDS PER SQUARE INCH, SAID HYDROXYPROPYL CELLULOSE BEING CHARACTERIZED BY: HAVING A HIGH DEGREE OF THERMOPLASTICITY AND AN M.S. OF AT LEAST 2, BEING SOLUBLE IN COLD WATER AND POLAR ORGANIC SOLVENTS AND INSOLUBLE IN HOT WATER.
Claim 2
Dependent Claim
64 words
PROCESS OF PREPARING ARTICLES OF MANUFACTURE OF ANY DESIRED SHAPE WHICH COMPRISES SUBJECTING HYDROXYPROPYL CELLULOSE TO A TEMPERATURE OF ABOUT 80*C.-250*C. AND A PRESSURE OF ABOUT 50-25,000 POUNDS PER SQUARE INCH, SAID HYDROXYPROPYL CELLULOSE BEING CHARACTERIZED BY: HAVING A HIGH DEGREE OF THERMOPLASTICITY AND AN M.S. OF AT LEAST 2, BEING SOLUBLE IN COLD WATER AND POLAR ORGANIC SOLVENTS AND INSOLUBLE IN HOT WATER.
References Cited (Backward Citations)
GB344528A
Cited
US2602755A
Cited
US2771377A
Cited
US2810659A
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US2836506A
Cited
US2836505A
Cited
US2840485A
Cited
GB840872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-17 | 1970-10-17 | 1971-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-17 | 1974-10-17 | 1975-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-17 | 1978-10-17 | 1979-04-18 | $7700.00 | Window Closed / Lapsed |