US783045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen-separating process.
Assignee: Individual
•
Filing: 1903-04-30
•
Granted: 1905-02-21
•
Expires: 1923-04-30
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Johnson Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:37
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/905; Y10S62/907
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) | 1908-02-21 | 1908-08-22 | 1909-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1912-02-21 | 1912-08-22 | 1913-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1916-02-21 | 1916-08-22 | 1917-02-21 | $7700.00 | Window Closed / Lapsed |