US3386159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a refractory metal-to-ceramic seal
Assignee: US Philips Corp
•
Filing: 1967-01-24
•
Granted: 1968-06-04
•
Expires: 1987-01-24
Abstract
No abstract record available.
Inventors
- 👤 Milch Alfred
- 👤 Joseph J Lalak
- 👤 Richard H Ahlert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:02
CPC Classifications
C; C22; C22C; C22C27/00; C22C27/04; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/636; C04B35/6365; C04B37/00; C04B37/02; C04B37/023; C04B37/026; C22C5/00; C22C5/04; C04B2235/00; C04B2235/65; C04B2235/656; C04B2235/6567; C04B2235/658; C04B2235/6582; C04B2235/6588; C04B2237/00; C04B2237/02; C04B2237/04; C04B2237/06; C04B2237/068; C04B2237/12; C04B2237/122; C04B2237/125; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/50; C04B2237/52; C04B2237/59; C04B2237/597; C04B2237/72; C04B2237/76; C04B2237/765; C04B2237/80; C04B2237/86; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/936; Y10S428/939; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/1216; Y10T428/12493; Y10T428/12535; Y10T428/12611; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/1284; Y10T428/12861
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A METHOD OF HERMETICALLY JOINING A REFRACTORY CERAMIC BODY TO A REFRACTORY METAL SURFACE COMPRISING THE STEPS, FORMING ON A PORTION OF THE SURFACE OF THE CERAMIC BODY A TIGHTLY-ADHERENT SPONGY, POROUS LAYER OF A FIRST REFRACTORY METAL SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM, TUNGSTEN AND MIXTURES THEREOF, APPLYING OVER THE INTERIOR AND EXTERIOR SURFACES OF THE SPONGY METAL LAYER A SECOND REFRACTORY METAL SELECTED FROM THE GROUP CONSISTING OF RHENIUM, ALLOYS OF RUTHENIUM AND MOLYBDENUM, AND ALLOYS OF RHODIUM AND MOLYBDENUM WHICH ARE CAPABLE OF WETTING THE FIRST REFRACTORY METAL, AND JOINING THE REFRACTORY METAL SURFACE TO THE THUS COVERED SURFACE PORTION OF THE CERAMIC BODY WITH A REFRACTORY BRAZING METAL.
Claim 2
Independent Claim
113 words
A METHOD OF HERMETICALLY JOINING A REFRACTORY CERAMIC BODY TO A REFRACTORY METAL SURFACE COMPRISING THE STEPS, FORMING ON A PORTION OF THE SURFACE OF THE CERAMIC BODY A TIGHTLY-ADHERENT SPONGY, POROUS LAYER OF A FIRST REFRACTORY METAL SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM, TUNGSTEN AND MIXTURES THEREOF, APPLYING OVER THE INTERIOR AND EXTERIOR SURFACES OF THE SPONGY METAL LAYER A SECOND REFRACTORY METAL SELECTED FROM THE GROUP CONSISTING OF RHENIUM, ALLOYS OF RUTHENIUM AND MOLYBDENUM, AND ALLOYS OF RHODIUM AND MOLYBDENUM WHICH ARE CAPABLE OF WETTING THE FIRST REFRACTORY METAL, AND JOINING THE REFRACTORY METAL SURFACE TO THE THUS COVERED SURFACE PORTION OF THE CERAMIC BODY WITH A REFRACTORY BRAZING METAL.
References Cited (Backward Citations)
US2504522A
Cited
US2776472A
Cited
US2830169A
Cited
US2914640A
Cited
US3107756A
Cited
US3024522A
Cited
US3110101A
Cited
US3132928A
Cited
US3339267A
Cited
US3276113A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |