US2814618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spherical non-porous water-insoluble cellulose ethers
Assignee: Atlantic Research Corp
•
Filing: 1955-01-03
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Granted: 1957-11-26
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Expires: 1975-01-03
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Sloan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:20
CPC Classifications
C; C08; C08B; C08B11/00; C08B11/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
WATER-INSOLUBLE CELLULOSE ETHER SELECTED FROM THE GROUP CONSISTING OF ALKYL CELLULOSE AND HYDROXYALKYL CELLULOSE, IN THE FORM OF SOLID, SUBSTANTIALLY SPHERICAL, SUBSTANTIALLY NON-POROUS PARTICLES HAVING A MAXIMUM DIAMETER OF ABOUT 100 MICRONS, SAID PARTICLES BEING CHARACTERIZED BY THEIR ABILITY TO BE DISPERSED IN A PLASTICIZER TO FORM FLUID SUSPENSIONS.
Claim 2
Dependent Claim
49 words
WATER-INSOLUBLE CELLULOSE ETHER SELECTED FROM THE GROUP CONSISTING OF ALKYL CELLULOSE AND HYDROXYALKYL CELLULOSE, IN THE FORM OF SOLID, SUBSTANTIALLY SPHERICAL, SUBSTANTIALLY NON-POROUS PARTICLES HAVING A MAXIMUM DIAMETER OF ABOUT 100 MICRONS, SAID PARTICLES BEING CHARACTERIZED BY THEIR ABILITY TO BE DISPERSED IN A PLASTICIZER TO FORM FLUID SUSPENSIONS.
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US2631943A
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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) | 1960-11-25 | 1961-05-27 | 1961-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-25 | 1965-05-27 | 1965-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-25 | 1969-05-27 | 1969-11-26 | $7700.00 | Window Closed / Lapsed |