US631868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for compressing, sterilizing, and purifying air.
Assignee: Individual
•
Filing: 1897-12-31
•
Granted: 1899-08-29
•
Expires: 1917-12-31
Abstract
No abstract record available.
Inventors
- 👤 Allen Fowler
- 👤 Andrew J Harpole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:06
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/78; B29C48/80; B29C48/83; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86726
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) | 1902-08-29 | 1903-02-28 | 1903-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1906-08-29 | 1907-02-28 | 1907-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1910-08-29 | 1911-02-28 | 1911-08-30 | $7700.00 | Window Closed / Lapsed |