US3189470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic micaceous material
Assignee: Whittaker Corp
•
Filing: 1961-05-29
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Granted: 1965-06-15
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Expires: 1981-05-29
Abstract
No abstract record available.
Inventors
- 👤 Roger A Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:03
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/34; C04B12/00; C04B12/02; C04B35/00; C04B35/01; C04B35/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
83 words
A CERAMIC MATERIAL OF THE CRYSTALLINE TYPE ADAPTED FOR USE IN RADOMES, ANTENNA WINDOWS AND THE LIKE, CONSISTING ESSENTIALLY OF AN INTIMATE SUBSTANTIALLY HOMOGENEOUS MIXTURE OF MICACEOUS CRYSTALS AND A BINDER, SAID BINDER BEING PRESENT IN AN AMOUNT SUFFICIENT TO EFFECTIVELY BOND SAID MICACEOUS CRYSTALS, SAID BINDER BEING A EUTECTIC OF A METAL PYROPHOSPHATE AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF MICACEOUS CRYSTALS AND REFRACTORY OXIDES, SAID BINDER HAVING A MELTING POINT LESS THAN THE DECOMPOSITION POINT OF SAID MICACEOUS CRYSTALS.
References Cited (Backward Citations)
US2704261A
Cited
US2898216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |