US2839673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underwater lamp
Assignee: Individual
•
Filing: 1956-04-30
•
Granted: 1958-06-17
•
Expires: 1976-04-30
Abstract
No abstract record available.
Inventors
- 👤 Kenneth H Wilcoxon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:25
CPC Classifications
F; F21; F21V; F21V31/00; F21V31/005; F21V7/00; F21V7/005; F21V29/00; F21V29/50; F21V29/56; F21V29/70; F21V29/74; F21W; F21W2131/00; F21W2131/40; F21W2131/406
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB281181A
Cited
US1788509A
Cited
US2015324A
Cited
US1895887A
Cited
US2114173A
Cited
GB474779A
Cited
US2295046A
Cited
US2420362A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |