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Patent US2567515A successfully refreshed from Google Patents.
US2567515A
Expired / Lapsed
US
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Radiator in central heating installations
Assignee: Individual
•
Filing: 1948-09-29
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Granted: 1951-09-11
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Expires: 1968-09-29
Abstract
No abstract record available.
Inventors
- 👤 Janik Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:39
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/03; F28D1/0358
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1023793A
Cited
US1804083A
Cited
US1792768A
Cited
US1897113A
Cited
GB373454A
Cited
GB477106A
Cited
US2271437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-10 | 1955-03-12 | 1955-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-10 | 1959-03-12 | 1959-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-10 | 1963-03-12 | 1963-09-11 | $7700.00 | Window Closed / Lapsed |