US2864774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing electrically conductive plastic
Assignee: Sprague Electric Co
•
Filing: 1953-04-29
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Granted: 1958-12-16
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Expires: 1973-04-29
Abstract
No abstract record available.
Inventors
- 👤 Robinson Preston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:49
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A PROCESS FOR PRODUCING CRYPTOCRYSTALLINE MATAL WITH A RESINOUS COMPOSITION WHICH COMPRISES ADMIXING A NOBLE METAL SALT IN A PROPORTION OF 20% BY WEIGHT OF THE TOTAL COMPOSITION, A RESINOUS CONDENASTION PRODUCT OF AN ALDEHYDE WITH A MEMBER OF THR GROUP CONSISTING OF PHENOL, UREA AND MELAMINE, SAID CONDENSATION PRODUCT BEING CAPABLE OF UNDERGOING FURTHER POLYMERIZATION AND AN EXCESS OF THE ALDEHYDE IN A PROPORTION OF NOT MORE THAN 20% BY WEIGHT OF THE TOTAL COMPOSITION AND MOLDING THE SAID MIXTURE UNDER CONDITIONS OF ELEVATED TEMPERATURE IN THE RANGE OF 300 TO 330*F. AND PRESSURE OF FROM ABOUT 1500 TO 6000 P.S.I. FOR A PERIOD U TO 10 MINUTES SO AS TO PRODUCE A RIGID COMPOSITION IN WHICH SAID METAL SALT IS REDUCED TO CRYPTOCRYSTALLINE METAL PARTICLES BY SAID ALDEHYDE, THE AMOUNT OF METAL SALT IN A ALDEHYDE BEING SUCH AS TO HAVE THE CRYPTOCRYSTALLINE PARTICLES IMPART ELECTRICAL CONDUCTIVITY TO THE MOLDED PRODUCT.
Claim 2
Dependent Claim
153 words
A PROCESS FOR PRODUCING CRYPTOCRYSTALLINE MATAL WITH A RESINOUS COMPOSITION WHICH COMPRISES ADMIXING A NOBLE METAL SALT IN A PROPORTION OF 20% BY WEIGHT OF THE TOTAL COMPOSITION, A RESINOUS CONDENASTION PRODUCT OF AN ALDEHYDE WITH A MEMBER OF THR GROUP CONSISTING OF PHENOL, UREA AND MELAMINE, SAID CONDENSATION PRODUCT BEING CAPABLE OF UNDERGOING FURTHER POLYMERIZATION AND AN EXCESS OF THE ALDEHYDE IN A PROPORTION OF NOT MORE THAN 20% BY WEIGHT OF THE TOTAL COMPOSITION AND MOLDING THE SAID MIXTURE UNDER CONDITIONS OF ELEVATED TEMPERATURE IN THE RANGE OF 300 TO 330*F. AND PRESSURE OF FROM ABOUT 1500 TO 6000 P.S.I. FOR A PERIOD U TO 10 MINUTES SO AS TO PRODUCE A RIGID COMPOSITION IN WHICH SAID METAL SALT IS REDUCED TO CRYPTOCRYSTALLINE METAL PARTICLES BY SAID ALDEHYDE, THE AMOUNT OF METAL SALT IN A ALDEHYDE BEING SUCH AS TO HAVE THE CRYPTOCRYSTALLINE PARTICLES IMPART ELECTRICAL CONDUCTIVITY TO THE MOLDED PRODUCT.
References Cited (Backward Citations)
US2434190A
Cited
US2721357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-15 | 1962-06-16 | 1962-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-15 | 1966-06-16 | 1966-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-15 | 1970-06-16 | 1970-12-16 | $7700.00 | Window Closed / Lapsed |