US3342753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making electrically conductive vitreous materials
Assignee: US Philips Corp
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Filing: 1963-03-21
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Granted: 1967-09-19
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Expires: 1983-03-21
Abstract
No abstract record available.
Inventors
- 👤 Trap Hendrikus Johan Lodewijk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:43
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/04; H01C7/042; H01C7/043; H01C7/046; C; C03; C03C; C03C10/00; C03C10/0054; C03C3/00; C03C3/04; C03C3/062; C03C3/064; C03C3/076; C03C3/083; C03C3/089; C03C3/091; C03C4/00; C03C4/14; H01B; H01B1/00; H01B1/06; H01B1/08; H01B3/00; H01B3/02; H01B3/08; H01B3/087
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A METHOD OF MANUFACTURING AN ELECTRICALLY CONDUCTIVE VITREOUS MATERIAL COMPRISING THE STEPS, MIXING AL2O3, NA2O, IRON OXIDE IN THE FORM OF FE3O4, AT LEAST ONE OXIDE SELECTED FROM THE GROUP CONSISTING OF SIO2 AND B2O3, SAID OXIDES TOGETHER CONSTITUTING A FIRST GROUP OF OXIDES, AND AN OXIDE OF THE GROUP CONSISTING OF CO3O4, MNO, NIO, ANO, MGO, CAO, AND SRO IN PROPORTIONS YIELDING UPON HEATING A COMPOSITION CONSTITUTED OF AT LEAST 80 MOL PERCENT OF THE FIRST GROUP OF OXIDES IN THE FOLLOWING PROPORTIONS: 15<SIOI+B2O3<75 30-2(B2O3)$SIO2$65-3/4(BIO3) 21-1/6(SIO2+B2O3)<FE3O4<40-1/3(SIO2+B2O3) 2<AL2O3<30-3/8(SIO2) 3<NAI3<30 AND NOT MORE THAN 20 MOL PERCENT OF THE SECOND GROUP OF OXIDES IN THE FOLLOWING PROPORTIONS: SP% MOL PERCENT CO3O4 <12 MNO <12 NIO <8 ZNO <12 MGO <8 CAO <6 SRO <6SP@ AND HEATING SAID MIXTURE TO A TEMPERATURE OF ABOUT 1000* C. TO 1650*C. IN A WEAKLY-REDUCING TO WEAKLY-OXIDIZING ATMOSPHERE TO MELT SAID CONSTITUENTS AND FORM SAID VITREOUS MATERIAL.
Claim 2
Independent Claim
151 words
A METHOD OF MANUFACTURING AN ELECTRICALLY CONDUCTIVE VITREOUS MATERIAL COMPRISING THE STEPS, MIXING AL2O3, NA2O, IRON OXIDE IN THE FORM OF FE3O4, AT LEAST ONE OXIDE SELECTED FROM THE GROUP CONSISTING OF SIO2 AND B2O3, SAID OXIDES TOGETHER CONSTITUTING A FIRST GROUP OF OXIDES, AND AN OXIDE OF THE GROUP CONSISTING OF CO3O4, MNO, NIO, ANO, MGO, CAO, AND SRO IN PROPORTIONS YIELDING UPON HEATING A COMPOSITION CONSTITUTED OF AT LEAST 80 MOL PERCENT OF THE FIRST GROUP OF OXIDES IN THE FOLLOWING PROPORTIONS: 15<SIOI+B2O3<75 30-2(B2O3)$SIO2$65-3/4(BIO3) 21-1/6(SIO2+B2O3)<FE3O4<40-1/3(SIO2+B2O3) 2<AL2O3<30-3/8(SIO2) 3<NAI3<30 AND NOT MORE THAN 20 MOL PERCENT OF THE SECOND GROUP OF OXIDES IN THE FOLLOWING PROPORTIONS: SP% MOL PERCENT CO3O4 <12 MNO <12 NIO <8 ZNO <12 MGO <8 CAO <6 SRO <6SP@ AND HEATING SAID MIXTURE TO A TEMPERATURE OF ABOUT 1000* C. TO 1650*C. IN A WEAKLY-REDUCING TO WEAKLY-OXIDIZING ATMOSPHERE TO MELT SAID CONSTITUENTS AND FORM SAID VITREOUS MATERIAL.
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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |