Patent US2602875A successfully refreshed from Google Patents.
US2602875A
Expired / Lapsed
US
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Heating system and heating apparatus
Assignee: BEHM LAB Inc
•
Filing: 1948-11-01
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Granted: 1952-07-08
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Expires: 1968-11-01
Abstract
No abstract record available.
Inventors
- 👤 Behm Walther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:12
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/002; F24H3/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1681725A
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US1749909A
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US1788515A
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US1738100A
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US1852252A
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US2034172A
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US2271120A
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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) | 1955-07-08 | 1956-01-07 | 1956-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-08 | 1960-01-07 | 1960-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-08 | 1964-01-07 | 1964-07-08 | $7700.00 | Window Closed / Lapsed |