Patent US2580286A successfully refreshed from Google Patents.
US2580286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treating cellulosic and similar materials
Assignee: Individual
•
Filing: 1946-12-04
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Granted: 1951-12-25
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Expires: 1966-12-04
Abstract
No abstract record available.
Inventors
- 👤 Rowell R Dorsett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:47
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/68; D06M11/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
THE METHOD OF TREATING MATERIAL OF THE CLASS CONSISTING OF CELLULOSE, CELLULOSE COATED WITH RESIN, CELLULOSE COATED WITH STARCH, AND CELLULOSE COATED WITH MIXTURES OF RESIN AND STARCH TO THEREBY INHIBIT DEGRADATION THEREOF WHEN SAID TACTED WITH ACID WHICH CONSISTS IN WETTING SAID MATERIALS WITH AN AQUEOUS SOLUTIN 10.0% BY FROM ABOUT 0.5% BY WEIGHT TO ABOUT 10.0% BY WEIGHT OF AN ALKAL-METAL MOLECULARLY DEHYDRATED GLASSY PHOSPHATE HAVING A MOLAR RATIO OF M2O TO P2O5 OF FROM ABOUT 0.8:1 TO 1.7:1, HERE M IS A MEMBER OF THE GOUP CONSISTING OF AMMONIUM, LITHIUM, SODIUM AND POTASSIUM, REMOVING SAID MATERIALS FROM CONTACT WITH SAID SOLUTION AND DRYING THE SAME, THE PHOSPHATE RETAINED BY SAID MATERIAL INHIBITING DEGRADATION THEREY WHEN WETTED WITH ACID.
Claim 2
Independent Claim
121 words
THE METHOD OF TREATING MATERIAL OF THE CLASS CONSISTING OF CELLULOSE, CELLULOSE COATED WITH RESIN, CELLULOSE COATED WITH STARCH, AND CELLULOSE COATED WITH MIXTURES OF RESIN AND STARCH TO THEREBY INHIBIT DEGRADATION THEREOF WHEN SAID TACTED WITH ACID WHICH CONSISTS IN WETTING SAID MATERIALS WITH AN AQUEOUS SOLUTIN 10.0% BY FROM ABOUT 0.5% BY WEIGHT TO ABOUT 10.0% BY WEIGHT OF AN ALKAL-METAL MOLECULARLY DEHYDRATED GLASSY PHOSPHATE HAVING A MOLAR RATIO OF M2O TO P2O5 OF FROM ABOUT 0.8:1 TO 1.7:1, HERE M IS A MEMBER OF THE GOUP CONSISTING OF AMMONIUM, LITHIUM, SODIUM AND POTASSIUM, REMOVING SAID MATERIALS FROM CONTACT WITH SAID SOLUTION AND DRYING THE SAME, THE PHOSPHATE RETAINED BY SAID MATERIAL INHIBITING DEGRADATION THEREY WHEN WETTED WITH ACID.
References Cited (Backward Citations)
US1501895A
Cited
US1978792A
Cited
US1651751A
Cited
US1938746A
Cited
US2119525A
Cited
US2141189A
Cited
US2105446A
Cited
US2163085A
Cited
US2201992A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |