Patent US2226647A successfully refreshed from Google Patents.
US2226647A
Expired / Lapsed
US
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Water and gas tight light
Assignee: Individual
•
Filing: 1938-04-04
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Granted: 1940-12-31
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Expires: 1958-04-04
Abstract
No abstract record available.
Inventors
- 👤 Glen D Watkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:09
CPC Classifications
F; F21; F21L; F21L4/00; F21V; F21V21/00; F21V21/08; F21V21/0824; F21V23/00; F21V23/04; F21V23/0414
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) | 1943-12-31 | 1944-07-01 | 1944-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-31 | 1948-07-01 | 1948-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-31 | 1952-07-01 | 1952-12-31 | $7700.00 | Window Closed / Lapsed |