US1457646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-cooled lamp
Assignee: Individual
•
Filing: 1920-03-26
•
Granted: 1923-06-05
•
Expires: 1940-03-26
Abstract
No abstract record available.
Inventors
- 👤 Lyman A Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:28
CPC Classifications
F; F21; F21V; F21V29/00; F21V29/50; F21V29/56; G; G03; G03B; G03B21/00; G03B21/14; G03B21/16
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) | 1926-06-04 | 1926-12-04 | 1927-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-06-04 | 1930-12-04 | 1931-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-06-04 | 1934-12-04 | 1935-06-05 | $7700.00 | Window Closed / Lapsed |