Patent US937549A successfully refreshed from Google Patents.
US937549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire-extinguishing apparatus.
Assignee: AERATORS Ltd
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Filing: 1908-06-26
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Granted: 1909-10-19
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Expires: 1928-06-26
Abstract
No abstract record available.
Inventors
- 👤 Harry Vaughan Rudston Read
- 👤 Robert Hunter Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:23
CPC Classifications
A; A62; A62C; A62C13/00; A62C13/003
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) | 1912-10-18 | 1913-04-19 | 1913-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-10-18 | 1917-04-19 | 1917-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-10-18 | 1921-04-19 | 1921-10-19 | $7700.00 | Window Closed / Lapsed |