US1671548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens blank and method of making same
Assignee: Individual
•
Filing: 1926-06-09
•
Granted: 1928-05-29
•
Expires: 1946-06-09
Abstract
No abstract record available.
Inventors
- 👤 Walter C Schlitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:57
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/02; C03B23/023; C03B23/03; C03B23/0305; C03B21/00; C03B21/04; C03B23/20; C03B23/22; Y; Y10; Y10S; Y10S359/00; Y10S359/90; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1931-05-29 | 1931-11-28 | 1932-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-05-29 | 1935-11-28 | 1936-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-05-29 | 1939-11-28 | 1940-05-29 | $7700.00 | Window Closed / Lapsed |