US2809191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose esters and mixed esters in the form of small, dense, spherical particles
Assignee: Atlantic Research Corp
•
Filing: 1954-05-25
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Granted: 1957-10-08
•
Expires: 1974-05-25
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Sloan
- 👤 David J Mann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:27
CPC Classifications
B; B29; B29B; B29B9/00; C; C08; C08B; C08B3/00; C08B3/22; C08L; C08L1/00; C08L1/08; C08L1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
LOWER FATTY ACID ESTERS OF CELLULOSE IN THE FORM FINELY-DIVIDED MATERIAL CONSISTING ESSENTIALLY OF SOLID, SUBSTANTIALLY SPHERICAL, SUBSTANTIALLY NON-POROUS PARTICLES HAVING A MAXIMUM DIAMETER OF ABOUNT 100 MICRONS, SAID PARTICLES BEING CHARACTERIZED BY THEIR ABLITIY TO BE DISPERSED IN A PLASTICIZER TO FORM HOMOGENEOUS FLIUD SUSPENSIONS.
Claim 2
Dependent Claim
46 words
LOWER FATTY ACID ESTERS OF CELLULOSE IN THE FORM FINELY-DIVIDED MATERIAL CONSISTING ESSENTIALLY OF SOLID, SUBSTANTIALLY SPHERICAL, SUBSTANTIALLY NON-POROUS PARTICLES HAVING A MAXIMUM DIAMETER OF ABOUNT 100 MICRONS, SAID PARTICLES BEING CHARACTERIZED BY THEIR ABLITIY TO BE DISPERSED IN A PLASTICIZER TO FORM HOMOGENEOUS FLIUD SUSPENSIONS.
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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) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |