Patent US3531348A successfully refreshed from Google Patents.
Patent US3307017A successfully refreshed from Google Patents.
US3307017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric infrared emitter
Assignee: Heraeus Quarzschmelze GmbH
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Filing: 1964-07-01
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Granted: 1967-02-28
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Expires: 1984-07-01
Abstract
No abstract record available.
Inventors
- 👤 Horstmann Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:52
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/42; H05B3/44; F; F24; F24D; F24D13/00; F24D13/02; Y; Y02; Y02B; Y02B30/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
AN ELECTRIC INFRARED RADIANT HEAT EMITTER WHICH COMPRISES A PLURALITY OF ELONGATED HOLLOW TUBES TWISTED TOGETHER ABOUT A COMMON LONGITUDINAL AXIS, SAID TUBES BEING EACH MADE OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF GLASS, QUARTZ GLASS, AND QUARTZ WARE, AND A HELICALLY COILED ELECTRICAL RESISTANCE HEATING ELEMENT DISPOSED WITHIN EACH OF SAID HOLLOW TUBES FOR SUPPORT THEREBY AND FOR CONNECTION TO A SOURCE OF ELECTRICITY FOR ENERGIZATION THEREBY TO GENERATE AND EMIT INFRARED RADIANT HEAT, SAID
Claim 2
Dependent Claim
78 words
AN ELECTRIC INFRARED RADIANT HEAT EMITTER WHICH COMPRISES A PLURALITY OF ELONGATED HOLLOW TUBES TWISTED TOGETHER ABOUT A COMMON LONGITUDINAL AXIS, SAID TUBES BEING EACH MADE OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF GLASS, QUARTZ GLASS, AND QUARTZ WARE, AND A HELICALLY COILED ELECTRICAL RESISTANCE HEATING ELEMENT DISPOSED WITHIN EACH OF SAID HOLLOW TUBES FOR SUPPORT THEREBY AND FOR CONNECTION TO A SOURCE OF ELECTRICITY FOR ENERGIZATION THEREBY TO GENERATE AND EMIT INFRARED RADIANT HEAT, SAID
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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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |