US3001441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anhydro-blepharostatic contact lens
Assignee: Individual
•
Filing: 1957-08-05
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Granted: 1961-09-26
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Expires: 1977-08-05
Abstract
No abstract record available.
Inventors
- 👤 Herbert John Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:19
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/12; A61B3/125
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) | 1964-09-25 | 1965-03-27 | 1965-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-25 | 1969-03-27 | 1969-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-25 | 1973-03-27 | 1973-09-26 | $7700.00 | Window Closed / Lapsed |