US3087041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Space heater
Assignee: Era Heater Corp
•
Filing: 1958-10-07
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Granted: 1963-04-23
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Expires: 1978-10-07
Abstract
No abstract record available.
Inventors
- 👤 Vonk Bastiaan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:29
CPC Classifications
F; F23; F23C; F23C99/00; F23D; F23D14/00; F23D14/12; F23D14/151; F24; F24C; F24C1/00; F24C1/08; F23C2700/00; F23C2700/04; F23C2700/043
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
94 words
A SPACE HEATER COMPRISING AN INCANDESCENT SOURCE OF HEAT; AN ENCLOSURE PARTIALLY SURROUNDING SAID SOURCE, SAID ENCLOSURE HAVING AN OPEN SIDE; AND A COVER FITTING OVER SAID OPEN SIDE TO COOPERATE WITH SAID ENCLOSURE TO SEPARATE SAID SOURCE COMPLETELY FROM ATMOSPHERE EXTERNAL TO SAID ENCLOSURE, SAID COVER BEING SUBSTANTIALLY TRANSPARENT TO HEAT RADIATIONS FROM SAID SOURCE AND COMPRISING A PAIR OF WIRE GAUZE SCREENS, A LAYER COMPOSED OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF GLASS WOOL AND QUARTZ WOOL BETWEEN SAID SCREENS, AND A FRAME HOLDING SAID SCREENS AND SAID MATERIAL TOGETHER.
References Cited (Backward Citations)
US1237858A
Cited
US1472171A
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DE505043C
Cited
US2349300A
Cited
US2641313A
Cited
FR1138885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |