US2433013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for forming lenses
Assignee: American Optical Corp
•
Filing: 1942-12-28
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Granted: 1947-12-23
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Expires: 1962-12-28
Abstract
No abstract record available.
Inventors
- 👤 Byron J Ziegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:54
CPC Classifications
C; C03; C03B; C03B11/00; C03B11/06; C03B11/08; C03B23/00; C03B23/20; C03B23/22; C03B2215/00; C03B2215/40; C03B2215/46; C03B2215/49; Y; Y10; Y10S; Y10S425/00; Y10S425/808
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) | 1950-12-22 | 1951-06-23 | 1951-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-22 | 1955-06-23 | 1955-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-22 | 1959-06-23 | 1959-12-23 | $7700.00 | Window Closed / Lapsed |