US2720690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for threading bases on the leads of fluorescent lamps
Assignee: Westinghouse Electric Corp
•
Filing: 1951-04-06
•
Granted: 1955-10-18
•
Expires: 1971-04-06
Abstract
No abstract record available.
Inventors
- 👤 Mullan Daniel
- 👤 Theodore F May
- 👤 Bauer Hugo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:07
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/24; H01J9/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2419484A
Cited
US1832677A
Cited
US2069386A
Cited
US2069086A
Cited
US2120877A
Cited
US2390139A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |