US3211516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally stabilized cellulose materials
Assignee: McGraw Edison Co
•
Filing: 1962-07-16
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Granted: 1965-10-12
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Expires: 1982-07-16
Abstract
No abstract record available.
Inventors
- 👤 Fred S Sadler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:09
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/35
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
THE METHOD OF INCREASING THE THERMAL STABILITY OF CELLULOSIC MATERIALS, COMPRISING THE STEP OF APPLYING TO THE CELLULOSIC MATERIAL THE COMBINATION OF A DIAMINE HAVING THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
87 words
IN AN ENCASED ELECTRICAL INSTRUMENTALITY INCLUDING COOPERATING CONDUCTORS AND A LIQUID DIELECTRIC, CELLULOSE FIBER INSULATION MATERIAL HAVING IMPROVED THERMAL STABILITY AND PREPARED BY TREATING THE CELLULOSE FIBERS WITH THE COMBINATION OF A CYCLIC DIAMINE HAVING THE FOLLOWING FORMULA: 1-R-PIPERAZINE WHERE R IS SELECTED FROM THE GROUP CONSISTING OF H AND AN ALKYL GROUP HAVING FROM 1 TO 6 CARBON ATOMS, AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF A PROTEIN AND A CATIONIC STARCH, SAID INSULATION MATERIAL CONTAINING FROM 0.1 TO 3.0% BY WEIGHT OF NITROGEN.
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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) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |