US3363449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for measuring the leaktightness of filtering masks
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1966-01-17
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Granted: 1968-01-16
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Expires: 1986-01-17
Abstract
No abstract record available.
Inventors
- 👤 Ulmann Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:25
CPC Classifications
A; A62; A62B; A62B27/00; G; G01; G01M; G01M3/00; G01M3/02; G01M3/26; G01M3/32; G01M3/3218
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-15 | 1971-07-17 | 1972-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-15 | 1975-07-17 | 1976-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-15 | 1979-07-17 | 1980-01-16 | $7700.00 | Window Closed / Lapsed |