US986907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Respiratory apparatus for firemen or others.
Assignee: Individual
•
Filing: 1910-03-02
•
Granted: 1911-03-14
•
Expires: 1930-03-02
Abstract
No abstract record available.
Inventors
- 👤 Charles E Chapin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:21
CPC Classifications
A; A62; A62B; A62B7/00; A62B7/02
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) | 1914-03-13 | 1914-09-12 | 1915-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1918-03-13 | 1918-09-12 | 1919-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1922-03-13 | 1922-09-12 | 1923-03-14 | $7700.00 | Window Closed / Lapsed |