US2690497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heating attachment for lunch boxes
Assignee: Individual
•
Filing: 1952-10-14
•
Granted: 1954-09-28
•
Expires: 1972-10-14
Abstract
No abstract record available.
Inventors
- 👤 Wiggins Leroy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:54
CPC Classifications
A; A47; A47J; A47J36/00; A47J36/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2003714A
Cited
US2274285A
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US2295221A
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US2512712A
Cited
US2478529A
Cited
US2458837A
Cited
US2577870A
Cited
US2513218A
Cited
US2611851A
Cited
US2601546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-27 | 1958-03-29 | 1958-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-27 | 1962-03-29 | 1962-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-27 | 1966-03-29 | 1966-09-28 | $7700.00 | Window Closed / Lapsed |