Patent US1415833A successfully refreshed from Google Patents.
US1415833A
Expired / Lapsed
US
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Perspectoscope
Assignee: Individual
•
Filing: 1921-01-05
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Granted: 1922-05-09
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Expires: 1941-01-05
Abstract
No abstract record available.
Inventors
- 👤 Ginsburg Henrietta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:05
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/14; B43L13/16; A; A61; A61B; A61B5/00; A61B5/103; A61B5/107; A61B5/1071
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) | 1925-05-08 | 1925-11-07 | 1926-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-05-08 | 1929-11-07 | 1930-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-05-08 | 1933-11-07 | 1934-05-09 | $7700.00 | Window Closed / Lapsed |