Patent US1635819A successfully refreshed from Google Patents.
US1635819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-cooled roof for reverberatory furnaces
Assignee: Individual
•
Filing: 1926-12-09
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Granted: 1927-07-12
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Expires: 1946-12-09
Abstract
No abstract record available.
Inventors
- 👤 Corcoran Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:38
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/02; F27D1/025
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) | 1930-07-11 | 1931-01-10 | 1931-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-07-11 | 1935-01-10 | 1935-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-07-11 | 1939-01-10 | 1939-07-12 | $7700.00 | Window Closed / Lapsed |