Patent US2845253A successfully refreshed from Google Patents.
US2845253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating or cooling buildings
Assignee: Individual
•
Filing: 1955-03-24
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Granted: 1958-07-29
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Expires: 1975-03-24
Abstract
No abstract record available.
Inventors
- 👤 Runte Egon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:05
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/053; F28D1/0535; F28D1/05366; F28D1/05375; F28D1/0233; F28F; F28F1/00; F28F1/02; F28F1/04; F28F1/045; F28F3/00; F28F3/02; F28F3/025; F28D21/00; F28D2021/0019; F28D2021/0035; Y; Y02; Y02B; Y02B30/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1884098A
Cited
GB366770A
Cited
US1937774A
Cited
US2044832A
Cited
US2375556A
Cited
US2467935A
Cited
US2651504A
Cited
US2739792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |