US1222741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of heating and apparatus therefor.
Assignee: IMPROVED EQUIPMENT Co
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Filing: 1913-07-02
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Granted: 1917-04-17
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Expires: 1933-07-02
Abstract
No abstract record available.
Inventors
- 👤 Henry L Doherty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:44
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/74; C21D1/767; F; F27; F27B; F27B9/00; F27B9/30; F27B9/3005; F27B9/3011
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 |