US2687523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens case for welders' helmets and other face protectors
Assignee: Individual
•
Filing: 1952-11-06
•
Granted: 1954-08-31
•
Expires: 1972-11-06
Abstract
No abstract record available.
Inventors
- 👤 John V Bernhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:41
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/04; A61F9/06; A42; A42B; A42B3/00; A42B3/04; A42B3/18; A42B3/22; A42B3/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |