US2550575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable headband construction
Assignee: CHICAGO EYE SHIELD CO
•
Filing: 1945-06-11
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Granted: 1951-04-24
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Expires: 1965-06-11
Abstract
No abstract record available.
Inventors
- 👤 Robert L Malcom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:58
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/10; A42B3/14; A42B3/145; Y; Y10; Y10T; Y10T24/00; Y10T24/14; Y10T24/1412
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) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |