US2852017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating apparatus
Assignee: LIDEN
•
Filing: 1956-02-06
•
Granted: 1958-09-16
•
Expires: 1976-02-06
Abstract
No abstract record available.
Inventors
- 👤 Hamberg Gustav Seth
- 👤 Liden Odd Gunnar August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:45
CPC Classifications
F; F24; F24C; F24C3/00; F24C3/002; F24C3/004; F24C1/00; F24C1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1576086A
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US801244A
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US940445A
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FR504705A
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US1681476A
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US1695079A
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US2021581A
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US2196828A
Cited
US2163928A
Cited
US2632435A
Cited
GB723437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |