Patent US2156476A successfully refreshed from Google Patents.
Patent US2613312A successfully refreshed from Google Patents.
US2613312A
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Heating apparatus
Assignee: Westinghouse Electric Corp
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Filing: 1950-11-02
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Granted: 1952-10-07
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Expires: 1970-11-02
Abstract
No abstract record available.
Inventors
- 👤 Thurston Vinal Dale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:23
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/02; H05B3/06; F; F24; F24H; F24H9/00; F24H9/18; F24H9/1809; F24H9/1818
Claims Analysis
Total Claims: 0
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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) | 1955-10-07 | 1956-04-07 | 1956-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-07 | 1960-04-07 | 1960-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-07 | 1964-04-07 | 1964-10-07 | $7700.00 | Window Closed / Lapsed |