US3560327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminate comprising a ceramic layer,a polytetrafluoroethylene coating layer and a bonding layer of low thermal expansion solder glass
Assignee: Anchor Hocking LLC
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Filing: 1969-09-05
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Granted: 1971-02-02
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Expires: 1989-09-05
Abstract
Abstract DEVITRIFYING GLASS COMPOSITIONS FOR USE AS SOLDER GLASSSES OR COATINGS, INCLUDING ABOUT 13-23 WT. PERCENT PBO, 4-11% B2O3, 4-6% LIO2, 14-19% AL2O3 AND 3950% SIO2. A NUCLEATING AGENT MAY ALSO BE INCLUDED. WHEN CRYSTALLIZED THE COMPOSITIONS HAVE COEFFICIENTS OF THERMAL EXPANSION IN THE RANGE OF ABOUT -5 TO +30X10**-7/*C., AND CONTAIN LITHIA-ALUMINA-SILICATE CRYSTALS (BETA SPODUMENE OR BETA-EUCRPTITE) AS THE PRIMARY TYPE, WITH NO LEAD SILICATE OR ZINC SILICATE CRYSTALS PRESENT.
Inventors
- 👤 Walter H Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:29
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C03; C03C; C03C10/00; C03C10/0054; C03C8/00; C03C8/24; C04B41/45; C04B41/52; C04B41/80; C04B41/81; C04B41/89; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |