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US3490887A
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US
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Ferroelectric glass-ceramics
Assignee: Corning Glass Works
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Filing: 1966-03-30
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Granted: 1970-01-20
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Expires: 1986-03-30
Abstract
No abstract record available.
Inventors
- 👤 Andrew Herczog
- 👤 Margaret M Layton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:08
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682; C03; C03C; C03C10/00; C03C10/0072; C04B35/4684; H; H01; H01G; H01G7/00; H01G7/02; H01G7/028
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3146114A
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US3282711A
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US3249466A
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GB944571A
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US3231456A
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US3291586A
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US3195030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |