Patent US2840684A successfully refreshed from Google Patents.
US2840684A
Expired / Lapsed
US
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Combination frying pan and griddle and method of heating the operative surface thereof
Assignee: Individual
•
Filing: 1955-06-10
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Granted: 1958-06-24
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Expires: 1975-06-10
Abstract
No abstract record available.
Inventors
- 👤 Jr William B Watkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:54
CPC Classifications
A; A47; A47J; A47J37/00; A47J37/10; A47J37/105; Y; Y10; Y10S; Y10S439/00; Y10S439/928
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1857781A
Cited
US1951257A
Cited
GB440813A
Cited
US2164813A
Cited
US2480337A
Cited
US2571782A
Cited
GB664113A
Cited
US2749427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |