Patent US3581084A successfully refreshed from Google Patents.
Patent US2170201A successfully refreshed from Google Patents.
US2170201A
Expired / Lapsed
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Adjustable electric lamp
Assignee: Individual
•
Filing: 1938-09-22
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Granted: 1939-08-22
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Expires: 1958-09-22
Abstract
No abstract record available.
Inventors
- 👤 Knapp William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:35
CPC Classifications
F; F21; F21V; F21V21/00; F21V21/14; F21V21/26; Y; Y10; Y10S; Y10S285/00; Y10S285/907; Y10T; Y10T403/00; Y10T403/32; Y10T403/32008; Y10T403/32081; Y10T403/32254; Y10T403/32262; Y10T403/32418; Y10T403/32532; Y10T403/32549; Y10T403/32557; Y10T403/32591; Y10T403/32606; Y10T403/32819; Y10T403/32827
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) | 1942-08-21 | 1943-02-20 | 1943-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-08-21 | 1947-02-20 | 1947-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-08-21 | 1951-02-20 | 1951-08-22 | $7700.00 | Window Closed / Lapsed |