US2762368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Respiratory masks
Assignee: Martindale Electric Co Ltd
•
Filing: 1955-01-06
•
Granted: 1956-09-11
•
Expires: 1975-01-06
Abstract
No abstract record available.
Inventors
- 👤 Bloomfield Herbert George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:24
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/02; A61F9/025; A41; A41D; A41D13/00; A41D13/05; A41D13/11; A41D13/1184; A61F9/029
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR864401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |