US2279904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereoscope
Assignee: KEYSTONE VIEW Co
•
Filing: 1940-12-21
•
Granted: 1942-04-14
•
Expires: 1960-12-21
Abstract
No abstract record available.
Inventors
- 👤 Donald P Mossman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:24
CPC Classifications
C; C09; C09H; C09H1/00; C09H1/04; C12; C12N; C12N9/00; C12N9/14; C12N9/48; C12N9/50; C12N9/58; C12N9/62; C14; C14C; C14C1/00; C14C1/08; G; G02; G02B; G02B30/00; G02B30/20; G02B30/34
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) | 1945-04-13 | 1945-10-13 | 1946-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-04-13 | 1949-10-13 | 1950-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-04-13 | 1953-10-13 | 1954-04-14 | $7700.00 | Window Closed / Lapsed |