NL28880C - - Google Patents
Info
- Publication number
- NL28880C NL28880C NL28880DA NL28880C NL 28880 C NL28880 C NL 28880C NL 28880D A NL28880D A NL 28880DA NL 28880 C NL28880 C NL 28880C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
- H01J61/72—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a main light-emitting filling of easily vaporisable metal vapour, e.g. mercury
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL351894X | 1930-01-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL28880C true NL28880C (en(2012)) |
Family
ID=19785072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL28880D NL28880C (en(2012)) | 1930-01-09 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2020715A (en(2012)) |
| DE (1) | DE560976C (en(2012)) |
| FR (1) | FR706729A (en(2012)) |
| GB (1) | GB351894A (en(2012)) |
| NL (1) | NL28880C (en(2012)) |
-
0
- NL NL28880D patent/NL28880C/xx active
-
1930
- 1930-10-21 US US490262A patent/US2020715A/en not_active Expired - Lifetime
- 1930-11-28 GB GB35874/30A patent/GB351894A/en not_active Expired
- 1930-11-29 DE DE1930560976D patent/DE560976C/de not_active Expired
- 1930-11-29 FR FR706729D patent/FR706729A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2020715A (en) | 1935-11-12 |
| FR706729A (fr) | 1931-06-29 |
| GB351894A (en) | 1931-07-02 |
| DE560976C (de) | 1932-10-08 |