US2549926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making optical devices
Assignee: American Optical Corp
•
Filing: 1947-05-02
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Granted: 1951-04-24
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Expires: 1967-05-02
Abstract
No abstract record available.
Inventors
- 👤 Gilbert E Pride
- 👤 Osterberg Harold
- 👤 Jupnik Helen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:49
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/50
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 |