US1287149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anesthetic-mask.
Assignee: SAFETY ANAESTHESIA APPARATUS CONCERN
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Filing: 1916-04-29
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Granted: 1918-12-10
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Expires: 1936-04-29
Abstract
No abstract record available.
Inventors
- 👤 Will P Walter
- 👤 David G Mccurdy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:39
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/06
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) | 1921-12-09 | 1922-06-10 | 1922-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-12-09 | 1926-06-10 | 1926-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-12-09 | 1930-06-10 | 1930-12-10 | $7700.00 | Window Closed / Lapsed |