US2260701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oronasal mask
Assignee: Individual
•
Filing: 1939-07-28
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Granted: 1941-10-28
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Expires: 1959-07-28
Abstract
No abstract record available.
Inventors
- 👤 Walter M Boothby
- 👤 Arthur H Bulbulian
- 👤 William R Lovelace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:37
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/10; A61M16/06; A61M16/0057; A61M16/0078; A61M16/0683
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) | 1944-10-27 | 1945-04-28 | 1945-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-10-27 | 1949-04-28 | 1949-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-10-27 | 1953-04-28 | 1953-10-28 | $7700.00 | Window Closed / Lapsed |