Patent US2585132A successfully refreshed from Google Patents.
US2997568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating structure
Assignee: Bristol Corp
•
Filing: 1959-01-19
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Granted: 1961-08-22
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Expires: 1979-01-19
Abstract
No abstract record available.
Inventors
- 👤 Herbert O Leipold
- 👤 Emil C Evancich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:41
CPC Classifications
E; E01; E01C; E01C11/00; E01C11/24; E01C11/26; E01C11/265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US530053A
Cited
US1349136A
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US2406884A
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US2486791A
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US2572695A
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US2607876A
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 |