US1568085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unitary light-projecting apparatus
Assignee: Individual
•
Filing: 1920-09-15
•
Granted: 1926-01-05
•
Expires: 1940-09-15
Abstract
No abstract record available.
Inventors
- 👤 Oscar H Pieper
- 👤 Alphonse F Pieper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:58
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/44; A61B6/4429; H; H05; H05G; H05G1/00; H05G1/02
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) | 1929-01-04 | 1929-07-06 | 1930-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-01-04 | 1933-07-06 | 1934-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-01-04 | 1937-07-06 | 1938-01-05 | $7700.00 | Window Closed / Lapsed |