US1771077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heating by steam
Assignee: C A DUNHAM Co
•
Filing: 1929-07-26
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Granted: 1930-07-22
•
Expires: 1949-07-26
Abstract
No abstract record available.
Inventors
- 👤 Clayton A Dunham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:17
CPC Classifications
F; F24; F24D; F24D1/00; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7924
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) | 1933-07-21 | 1934-01-20 | 1934-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-07-21 | 1938-01-20 | 1938-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-07-21 | 1942-01-20 | 1942-07-22 | $7700.00 | Window Closed / Lapsed |