Patent US1821000A successfully refreshed from Google Patents.
US3010013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Operating room lamp
Assignee: Quarzlampen GmbH
•
Filing: 1958-04-18
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Granted: 1961-11-21
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Expires: 1978-04-18
Abstract
No abstract record available.
Inventors
- 👤 Gunther Hermann
- 👤 Staeger Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:30
CPC Classifications
F; F21; F21V; F21V21/00; F21V21/14; F21V21/26; F21V21/28; F21V21/40; F21W; F21W2131/00; F21W2131/20; F21W2131/205
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2280402A
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US2242303A
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Cited
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US2911525A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-20 | 1965-05-22 | 1965-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-20 | 1969-05-22 | 1969-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-20 | 1973-05-22 | 1973-11-21 | $7700.00 | Window Closed / Lapsed |