US2675502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Incandescent lamp
Assignee: Individual
•
Filing: 1951-12-20
•
Granted: 1954-04-13
•
Expires: 1971-12-20
Abstract
No abstract record available.
Inventors
- 👤 Kenton D Mcmahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:34
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/02; H01K1/16; H01K1/18; H01K1/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1365481A
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US1721292A
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US1831052A
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US2039773A
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US2039772A
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GB423078A
Cited
US2081801A
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US2214742A
Cited
US2483247A
Cited
US2457734A
Cited
US2646489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |