US1506964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater
Assignee: WELSBACH Co
•
Filing: 1921-03-28
•
Granted: 1924-09-02
•
Expires: 1941-03-28
Abstract
No abstract record available.
Inventors
- 👤 William D Antrim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:28
CPC Classifications
F; F24; F24C; F24C3/00; F24C3/04; F24C3/042; F23; F23D; F23D14/00; F23D14/02; F23D14/04; F23D14/12; F23D14/14; F23D14/149; F23D14/151; F24C15/00; F24C15/22; F24C3/14
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) | 1927-09-02 | 1928-03-03 | 1928-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-09-02 | 1932-03-03 | 1932-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-09-02 | 1936-03-03 | 1936-09-02 | $7700.00 | Window Closed / Lapsed |