Patent US2931801A successfully refreshed from Google Patents.
US2931801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose nitrate
Assignee: Atlantic Research Corp
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Filing: 1954-08-13
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Granted: 1960-04-05
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Expires: 1974-08-13
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 22:46
CPC Classifications
C; C08; C08B; C08B5/00; C08B5/02; C08B5/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
CELLULOSE NITRATE, CONTAINING MORE THAN 12% NITROGEN, IN THE FORM OF SUBSTANTIALLY SPHERICAL, NON-POROUS PARTICLES HAVING A MAXIMUM AVERAGE DIAMETER OF ABOUT 50 MICRONS, AND A MAXIMUM DIAMETER OF ABOUT 100 MICRONS, AND A MINIMUM DENSITY OF 1.4, SAID PARTICLES BEING CHARACTERIZED BY THEIR ABILITY TO BE DISPERSED IN A PLASTICIZER TO FORM STABLE, FLUID SUSPENSIONS.
Claim 2
Dependent Claim
56 words
CELLULOSE NITRATE, CONTAINING MORE THAN 12% NITROGEN, IN THE FORM OF SUBSTANTIALLY SPHERICAL, NON-POROUS PARTICLES HAVING A MAXIMUM AVERAGE DIAMETER OF ABOUT 50 MICRONS, AND A MAXIMUM DIAMETER OF ABOUT 100 MICRONS, AND A MINIMUM DENSITY OF 1.4, SAID PARTICLES BEING CHARACTERIZED BY THEIR ABILITY TO BE DISPERSED IN A PLASTICIZER TO FORM STABLE, FLUID SUSPENSIONS.
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) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |