US3437804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light transmitting device
Assignee: Quarzlampen GmbH
•
Filing: 1965-04-05
•
Granted: 1969-04-08
•
Expires: 1985-04-05
Abstract
No abstract record available.
Inventors
- 👤 Volker Schaefer
- 👤 Juergen Schaefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:46
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4298; G02B6/4201; G02B6/4204; G02B6/4206; G02B6/4214
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3127112A
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USRE17037E
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GB229039A
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US1965865A
Cited
US2254962A
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GB514201A
Cited
US3016785A
Cited
US3028483A
Cited
US3099403A
Cited
US3107296A
Cited
US3179898A
Cited
US3255342A
Cited
US3285242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |