Patent US3303324A successfully refreshed from Google Patents.
US3303324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating unit
Assignee: Individual
•
Filing: 1964-08-21
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Granted: 1967-02-07
•
Expires: 1984-08-21
Abstract
No abstract record available.
Inventors
- 👤 Appleman Leon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:34
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/20; H05B3/22; H05B3/26; A; A47; A47J; A47J37/00; A47J37/06; A47J37/067; A47J37/0676
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A HEATER UNIT COMPRISING A QUARTZ PLATE ELEMENT, A BACKING MEMBER HAVING TWO SURFACES, ONE OF SAID SURFACES BEING IN ABUTTING RELATIONSHIP WITH SAID QUARTZ PLATE ELEMENT, CONTINUOUS GROOVE MEANS DEFINED IN SAID ONE SURFACE OF SAID BACKING MEMBER IN FACING RELATIONSHIP TO SAID QUARTZ PLATE ELEMENT, A COILED RESISTANCE WIRE HAVING TWO ENDS DISPOSED IN SAID GROOVE MEANS CLOSELY PRESSED AGAINST SAID QUARTZ PLATE ELEMENT, THE DEPTH OF SAID GROOVE
Claim 2
Dependent Claim
71 words
A HEATER UNIT COMPRISING A QUARTZ PLATE ELEMENT, A BACKING MEMBER HAVING TWO SURFACES, ONE OF SAID SURFACES BEING IN ABUTTING RELATIONSHIP WITH SAID QUARTZ PLATE ELEMENT, CONTINUOUS GROOVE MEANS DEFINED IN SAID ONE SURFACE OF SAID BACKING MEMBER IN FACING RELATIONSHIP TO SAID QUARTZ PLATE ELEMENT, A COILED RESISTANCE WIRE HAVING TWO ENDS DISPOSED IN SAID GROOVE MEANS CLOSELY PRESSED AGAINST SAID QUARTZ PLATE ELEMENT, THE DEPTH OF SAID GROOVE
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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |