Patent US2995131A successfully refreshed from Google Patents.
US2995131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Face mask
Assignee: Individual
•
Filing: 1958-07-03
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Granted: 1961-08-08
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Expires: 1978-07-03
Abstract
No abstract record available.
Inventors
- 👤 James O Elam
- 👤 John L Evers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:16
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/04; A61M16/0488; A61M16/049; A61M16/0493; A61M16/0495; A61M16/0048
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB447086A
Cited
US1177208A
Cited
US1848234A
Cited
US2079581A
Cited
US2280050A
Cited
US2521084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-07 | 1965-02-06 | 1965-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-07 | 1969-02-06 | 1969-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-07 | 1973-02-06 | 1973-08-08 | $7700.00 | Window Closed / Lapsed |