US2810385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for supporting apparatus on the head
Assignee: American Optical Corp
•
Filing: 1952-11-07
•
Granted: 1957-10-22
•
Expires: 1972-11-07
Abstract
No abstract record available.
Inventors
- 👤 Wesley B Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:59
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/08; A62B18/084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1456524A
Cited
US1395759A
Cited
US2039234A
Cited
GB521282A
Cited
US2353643A
Cited
US2695020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |