US1086215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve for vacuum heating systems.
Assignee: Individual
•
Filing: 1913-05-17
•
Granted: 1914-02-03
•
Expires: 1933-05-17
Abstract
No abstract record available.
Inventors
- 👤 Alonzo Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:40
CPC Classifications
F; F24; F24D; F24D19/00; F24D19/08; F24D19/081; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3084; Y10T137/3087; Y10T137/309; Y10T137/3099; Y10T137/7287; Y10T137/7358; Y10T137/7423; Y10T137/7426; Y10T137/8593; Y10T137/87917; Y10T137/88054; Y10T137/88062
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) | 1917-02-02 | 1917-08-04 | 1918-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1921-02-02 | 1921-08-04 | 1922-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1925-02-02 | 1925-08-04 | 1926-02-03 | $7700.00 | Window Closed / Lapsed |