Patent US3253379A successfully refreshed from Google Patents.
Patent US800977A successfully refreshed from Google Patents.
US800977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface heating or cooling apparatus.
Assignee: Individual
•
Filing: 1905-05-24
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Granted: 1905-10-03
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Expires: 1925-05-24
Abstract
No abstract record available.
Inventors
- 👤 Arthur Wilfred Brewtnall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:02
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/08; F28F3/083; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/356
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1908-10-02 | 1909-04-03 | 1909-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1912-10-02 | 1913-04-03 | 1913-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1916-10-02 | 1917-04-03 | 1917-10-03 | $7700.00 | Window Closed / Lapsed |