US3311482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintered transparent bodies of aluminum oxide and method of preparing the same
Assignee: Individual
•
Filing: 1966-01-25
•
Granted: 1967-03-28
•
Expires: 1986-01-25
Abstract
No abstract record available.
Inventors
- 👤 Emil A Klingler
- 👤 Dawihl Walther
- 👤 Dorre Erhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:32
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/10; C04B35/111; C04B35/115
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A POLYCRYSTALLINE BODY CONSISTING ESSENTIALLY OF SINTERED GRAINS OF ALUMINUM OXIDE, THE AVERAGE SIZE OF SAID GRAINS BEING LESS THAN TEN MICRONS, SAID BODY HAVING A SPECIFIC GRAVITY GREATER THAN 3.96, AND AN IN-LINE TRANSMISSIVITY OF AT LEAST 40 PERCENT IN LAYERS OF 0.5 MILLIMETER FOR ALL LIGHT HAVING A WAVELENGTH BETWEEN 0.4 MICRON AND 2 MICRONS.
Claim 2
Dependent Claim
57 words
A POLYCRYSTALLINE BODY CONSISTING ESSENTIALLY OF SINTERED GRAINS OF ALUMINUM OXIDE, THE AVERAGE SIZE OF SAID GRAINS BEING LESS THAN TEN MICRONS, SAID BODY HAVING A SPECIFIC GRAVITY GREATER THAN 3.96, AND AN IN-LINE TRANSMISSIVITY OF AT LEAST 40 PERCENT IN LAYERS OF 0.5 MILLIMETER FOR ALL LIGHT HAVING A WAVELENGTH BETWEEN 0.4 MICRON AND 2 MICRONS.
References Cited (Backward Citations)
US3026210A
Cited
US3026177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |