Patent US2231074A successfully refreshed from Google Patents.
US2231074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light reflecting shade
Assignee: Individual
•
Filing: 1937-04-26
•
Granted: 1941-02-11
•
Expires: 1957-04-26
Abstract
No abstract record available.
Inventors
- 👤 John A Korengold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:49
CPC Classifications
F; F21; F21V; F21V5/00; F21V5/04; F21V1/00; F21V1/26; F21V29/00; F21V29/50; F21V29/502; F21V29/507; F21V7/00; F21V7/04; F21V7/06; F21V7/09; F21V29/70; F21V29/83
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) | 1944-02-11 | 1944-08-12 | 1945-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-11 | 1948-08-12 | 1949-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-11 | 1952-08-12 | 1953-02-11 | $7700.00 | Window Closed / Lapsed |