Patent US3174067A successfully refreshed from Google Patents.
US3174067A
Expired / Lapsed
US
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Construction for projection lamps eliminating undesired infrared radiation
Assignee: Osram GmbH
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Filing: 1961-07-17
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Granted: 1965-03-16
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Expires: 1981-07-17
Abstract
No abstract record available.
Inventors
- 👤 Bahrs Siegfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:09
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/16; G03B21/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |