US2783407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Source of light
Assignee: Individual
•
Filing: 1953-06-25
•
Granted: 1957-02-26
•
Expires: 1973-06-25
Abstract
No abstract record available.
Inventors
- 👤 Vierkotter Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:12
CPC Classifications
H; H05; H05B; H05B33/00; F; F21; F21K; F21K2/00; H01; H01J; H01J63/00; H01J2893/00; H01J2893/0031
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US865367A
Cited
US1275890A
Cited
US1636970A
Cited
US2135707A
Cited
US2177705A
Cited
US2227418A
Cited
US2222668A
Cited
US2563474A
Cited
US2299720A
Cited
US2438181A
Cited
US2449880A
Cited
US2421571A
Cited
US2543728A
Cited
US2566349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-26 | 1960-08-27 | 1961-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-26 | 1964-08-27 | 1965-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-26 | 1968-08-27 | 1969-02-26 | $7700.00 | Window Closed / Lapsed |