US3312533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic article with sintered metallic layer and flux
Assignee: US Philips Corp
•
Filing: 1964-05-27
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Granted: 1967-04-04
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Expires: 1984-05-27
Abstract
No abstract record available.
Inventors
- 👤 Botden Theodoor Peter Johannes
- 👤 Klomp Johannes Theodorus
- 👤 Adrianus Johannes Cornelis Ven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:43
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/636; C04B35/6365; C04B37/00; C04B37/02; C04B37/023; C04B37/026; C04B41/45; C04B41/50; C04B41/51; C04B41/5122; C04B41/5133; C04B41/5183; C04B41/80; C04B41/81; C04B41/85; C04B41/88; C04B2235/00; C04B2235/65; C04B2235/658; C04B2235/6582; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/122; C04B2237/125; C04B2237/126; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/40; C04B2237/405; C04B2237/50; C04B2237/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
AS AN ARTICLE OF MANUFACTURE, A BODY OF ALUMINA OF AT LEAST 96% PURITY HAVING AT LEAST A PORTION OF A SURFACE THEREOF COVERED WITH AN ADHERENT, SINTERED LAYER CONSISTING OF 60 TO 80% BY WEIGHT OF A HIGH-MELTING POINT METAL SELECTED FROM THE GROUP CONSISTING OF PLATINUM, TUNGSTEN, NIOBIUM AND TANTALUM AND BALANCE ESSENTIALLY A CALCIUM-CONTAINING MATERIAL CONSISTING OF CALCIUM OXIDE, ALUMINUM OXIDE, AND SILICON DIOXIDE, THE MOLAR RATIO
Claim 2
Dependent Claim
70 words
AS AN ARTICLE OF MANUFACTURE, A BODY OF ALUMINA OF AT LEAST 96% PURITY HAVING AT LEAST A PORTION OF A SURFACE THEREOF COVERED WITH AN ADHERENT, SINTERED LAYER CONSISTING OF 60 TO 80% BY WEIGHT OF A HIGH-MELTING POINT METAL SELECTED FROM THE GROUP CONSISTING OF PLATINUM, TUNGSTEN, NIOBIUM AND TANTALUM AND BALANCE ESSENTIALLY A CALCIUM-CONTAINING MATERIAL CONSISTING OF CALCIUM OXIDE, ALUMINUM OXIDE, AND SILICON DIOXIDE, THE MOLAR RATIO
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) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |