Patent US2997510A successfully refreshed from Google Patents.
US2997510A
Expired / Lapsed
US
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Furnace structure
Assignee: Individual
•
Filing: 1959-01-29
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Granted: 1961-08-22
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Expires: 1979-01-29
Abstract
No abstract record available.
Inventors
- 👤 Jr John R Gier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:39
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B23; B23K; B23K1/00; B23K1/008; B64; B64C; B64C1/00; B64C1/06; B64C2001/0054; B64C2001/0072; B64C2001/0081; Y; Y02; Y02T; Y02T50/00; Y02T50/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US726800A
Cited
US1002721A
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US2160825A
Cited
US2611790A
Cited
US2708158A
Cited
US2809822A
Cited
US2878560A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |