Patent US1848929A successfully refreshed from Google Patents.
Patent US1734834A successfully refreshed from Google Patents.
US1734834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light projector
Assignee: Individual
•
Filing: 1927-06-28
•
Granted: 1929-11-05
•
Expires: 1947-06-28
Abstract
No abstract record available.
Inventors
- 👤 Willard M Steward
- 👤 Harold C Block
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:53
CPC Classifications
F; F21; F21S; F21S41/00; F21S41/10; F21S41/14; F21S41/162; F21S41/30; F21S41/32; F21S41/321; F21S41/36; F21S41/365
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1932-11-04 | 1933-05-06 | 1933-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-11-04 | 1937-05-06 | 1937-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-11-04 | 1941-05-06 | 1941-11-05 | $7700.00 | Window Closed / Lapsed |