Patent US1632271A successfully refreshed from Google Patents.
Patent US2899316A successfully refreshed from Google Patents.
US2899316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized cellulose ester compositions
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
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Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:02
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A HIGH HEAT RESISTANT LOWER FATTY ACID ESTER OF CELLULOSE HAVING NOT MORE THAN 0.01% OF TOTAL COMBINED SULFUR TO WHICH HAS BEEN ADDED 0.01-0.05% OF AN ALKALI METAL OXALATE, STABILIZING QUANTITY WITHIN THE RANGE OF 0.01-0.5% OF SALT STABLIZER SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, CALCIUM, MAGNESIUM, COPPER, COBALT, MANGENESE, BARIUM, STRONTIUM, TIN, CADMIUM, AND CHROMIUM SALTS OF THE ALICYLIC ACIDS HAVING DISSOCIATION CONSTANTS LESS THAN 1.86X10-5 AND THE LEAD, IRON, AND ZINC SALTS OF ORGANIC ACIDS HAVING DISSOCIATION CONSTANTS OF LESS THAN 1.86X10-5, AND AT LEAST 0.01% OF A MONOHYDROXY, MONOCYCLIC SUBSTITUTED PHENYL, THE SUBSTITUENTS OF WHICH ARE SELECTED FROM THE GROUP CONSISTING OF METHOXY AND ALKYL.
Claim 2
Dependent Claim
110 words
A HIGH HEAT RESISTANT LOWER FATTY ACID ESTER OF CELLULOSE HAVING NOT MORE THAN 0.01% OF TOTAL COMBINED SULFUR TO WHICH HAS BEEN ADDED 0.01-0.05% OF AN ALKALI METAL OXALATE, STABILIZING QUANTITY WITHIN THE RANGE OF 0.01-0.5% OF SALT STABLIZER SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, CALCIUM, MAGNESIUM, COPPER, COBALT, MANGENESE, BARIUM, STRONTIUM, TIN, CADMIUM, AND CHROMIUM SALTS OF THE ALICYLIC ACIDS HAVING DISSOCIATION CONSTANTS LESS THAN 1.86X10-5 AND THE LEAD, IRON, AND ZINC SALTS OF ORGANIC ACIDS HAVING DISSOCIATION CONSTANTS OF LESS THAN 1.86X10-5, AND AT LEAST 0.01% OF A MONOHYDROXY, MONOCYCLIC SUBSTITUTED PHENYL, THE SUBSTITUENTS OF WHICH ARE SELECTED FROM THE GROUP CONSISTING OF METHOXY AND ALKYL.
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) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |