US2859745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar energy operated heaters
Assignee: Individual
•
Filing: 1954-05-04
•
Granted: 1958-11-11
•
Expires: 1974-05-04
Abstract
No abstract record available.
Inventors
- 👤 Brudersdorff Luis Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:38
CPC Classifications
F; F24; F24S; F24S20/00; F24S20/30; F24S23/00; F24S23/70; Y; Y02; Y02A; Y02A40/00; Y02A40/90; Y02A40/924; Y02A40/926; Y02E; Y02E10/00; Y02E10/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1579627A
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US1695061A
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US1951404A
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US2182222A
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US2259902A
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US2791214A
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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) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |