US1065690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulating and reversing apparatus for regenerative gas-furnaces.
Assignee: Individual
•
Filing: 1912-08-19
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Granted: 1913-06-24
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Expires: 1932-08-19
Abstract
No abstract record available.
Inventors
- 👤 Heinrich Kopper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:26
CPC Classifications
F; F16; F16K; F16K13/00; F16K13/08; F16K13/10; Y; Y10; Y10T; Y10T137/00; Y10T137/4456; Y10T137/4643; Y10T137/4658; Y10T137/8593; Y10T137/86187; Y10T137/86212
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) | 1916-06-23 | 1916-12-23 | 1917-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1920-06-23 | 1920-12-23 | 1921-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1924-06-23 | 1924-12-23 | 1925-06-24 | $7700.00 | Window Closed / Lapsed |