Patent US2341731A successfully refreshed from Google Patents.
Patent US1981328A successfully refreshed from Google Patents.
US1981328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illuminating device
Assignee: Individual
•
Filing: 1931-02-09
•
Granted: 1934-11-20
•
Expires: 1951-02-09
Abstract
No abstract record available.
Inventors
- 👤 Rivier Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:26
CPC Classifications
F; F21; F21S; F21S41/00; F21S41/40; F21S41/43; F21S41/10; F21S41/14; F21S41/162; F21S41/30; F21S41/32; F21S41/321; F21S41/323; 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) | 1937-11-19 | 1938-05-21 | 1938-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-11-19 | 1942-05-21 | 1942-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-11-19 | 1946-05-21 | 1946-11-20 | $7700.00 | Window Closed / Lapsed |