NL34189C - - Google Patents
Info
- Publication number
- NL34189C NL34189C NL34189DA NL34189C NL 34189 C NL34189 C NL 34189C NL 34189D A NL34189D A NL 34189DA NL 34189 C NL34189 C NL 34189C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
- H01J9/042—Manufacture, activation of the emissive part
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Solid Thermionic Cathode (AREA)
- Silicon Compounds (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE384351X | 1930-07-17 | ||
| US55129631A | 1931-07-16 | 1931-07-16 | |
| US676040A US2031721A (en) | 1930-07-17 | 1933-06-16 | Method of manufacturing highly emissive cathodes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL34189C true NL34189C (it) |
Family
ID=32511872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL34189D NL34189C (it) | 1930-07-17 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2031721A (it) |
| FR (1) | FR719981A (it) |
| GB (1) | GB384351A (it) |
| NL (1) | NL34189C (it) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB741369A (en) * | 1952-10-22 | 1955-11-30 | British Thomson Houston Co Ltd | Improvements in and relating to thermionic cathodes |
| HU143979A (it) * | 1953-11-05 | |||
| US7252868B2 (en) * | 2004-01-08 | 2007-08-07 | Certainteed Corporation | Reinforced fibrous insulation product and method of reinforcing same |
-
0
- NL NL34189D patent/NL34189C/xx active
-
1931
- 1931-07-11 FR FR719981D patent/FR719981A/fr not_active Expired
- 1931-07-15 GB GB20273/31A patent/GB384351A/en not_active Expired
-
1933
- 1933-06-16 US US676040A patent/US2031721A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2031721A (en) | 1936-02-25 |
| FR719981A (fr) | 1932-02-13 |
| GB384351A (en) | 1932-12-08 |