Patent US3308870A successfully refreshed from Google Patents.
US3308870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil burner air cone
Assignee: Rex Roto Corp
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Filing: 1964-09-30
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Granted: 1967-03-14
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Expires: 1984-09-30
Abstract
No abstract record available.
Inventors
- 👤 Jr John P Rex
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:35
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C04B28/26; F; F23; F23D; F23D11/00; F23D11/36; F23D11/40; F23D11/408
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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |