US2768384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ear protector
Assignee: Individual
•
Filing: 1954-05-27
•
Granted: 1956-10-30
•
Expires: 1974-05-27
Abstract
No abstract record available.
Inventors
- 👤 Kathryn B Crane
- 👤 Edgar M Crane
- 👤 Betty S Drake
- 👤 Julian D Drake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:04
CPC Classifications
A; A45; A45D; A45D44/00; A45D44/12
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) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |