Patent US1223308A successfully refreshed from Google Patents.
US1223308A
Expired / Lapsed
US
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Diaphragm apparatus for burning gases.
Assignee: RADIANT HEATING Ltd
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Filing: 1912-02-20
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Granted: 1917-04-17
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Expires: 1932-02-20
Abstract
No abstract record available.
Inventors
- 👤 William Arthur Bone
- 👤 James William Wilson
- 👤 Cyril Douglas Mccourt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:21
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/12; F23D14/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1920-04-16 | 1920-10-16 | 1921-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-04-16 | 1924-10-16 | 1925-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-04-16 | 1928-10-16 | 1929-04-17 | $7700.00 | Window Closed / Lapsed |