US3470862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Atmospheric flat-top stove
Assignee: Columbia Gas System Service Corp
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Filing: 1967-10-30
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Granted: 1969-10-07
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Expires: 1987-10-30
Abstract
No abstract record available.
Inventors
- 👤 Richard G Darrow
- 👤 William F Morse
- 👤 Edward A Reid Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:14
CPC Classifications
F; F23; F23C; F23C99/00; F24; F24C; F24C3/00; F24C3/04; F24C3/047; F24C3/06; F24C3/067; F23C2700/00; F23C2700/04; F23C2700/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |