US1376935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for and method of cutting drains in furnace-bottoms
Assignee: Individual
•
Filing: 1919-11-24
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Granted: 1921-05-03
•
Expires: 1939-11-24
Abstract
No abstract record available.
Inventors
- 👤 John O Griggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:30
CPC Classifications
F; F27; F27D; F27D99/00; F27B; F27B3/00; F27B3/10; F27B3/12; F27B3/14; F27D25/00
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) | 1924-05-02 | 1924-11-01 | 1925-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-05-02 | 1928-11-01 | 1929-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-05-02 | 1932-11-01 | 1933-05-03 | $7700.00 | Window Closed / Lapsed |