Patent US3513822A successfully refreshed from Google Patents.
US3513822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Space heaters
Assignee: Individual
•
Filing: 1969-09-10
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Granted: 1970-05-26
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Expires: 1989-09-10
Abstract
No abstract record available.
Inventors
- 👤 Otto Korngold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:51
CPC Classifications
A; A47; A47J; A47J37/00; A47J37/06; A47J37/07; A47J37/0704; A47J37/0713
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US558777A
Cited
US2513580A
Cited
US2867165A
Cited
US2998814A
Cited
US3064534A
Cited
US3021830A
Cited
US3244163A
Cited
US3276440A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |