Patent US3053516A successfully refreshed from Google Patents.
US3053516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating equipment
Assignee: KILLEBREW ENGINEERING Corp
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Filing: 1957-08-08
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Granted: 1962-09-11
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Expires: 1977-08-08
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Killebrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:51
CPC Classifications
F; F22; F22B; F22B1/00; F22B1/02; F22B1/16; F28; F28D; F28D21/00; F28D21/0001; F28D21/0003; F28D21/0005; F28D21/0007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1425273A
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US1731368A
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US1723082A
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US1943373A
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US1967706A
Cited
US2088905A
Cited
US2190382A
Cited
US2255967A
Cited
US2429408A
Cited
US2879749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |