US871308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface cooler.
Assignee: FIRM OF RUD A HARTMANN
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Filing: 1906-03-22
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Granted: 1907-11-19
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Expires: 1926-03-22
Abstract
No abstract record available.
Inventors
- 👤 Walter Vassel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:37
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/08; F28F3/083; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/399
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) | 1910-11-18 | 1911-05-20 | 1911-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1914-11-18 | 1915-05-20 | 1915-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1918-11-18 | 1919-05-20 | 1919-11-19 | $7700.00 | Window Closed / Lapsed |