US884275A
Expired / Lapsed
US
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Heat-regulating apparatus.
Assignee: WILLIAM B WADSWORTH
•
Filing: 1906-07-28
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Granted: 1908-04-07
•
Expires: 1926-07-28
Abstract
No abstract record available.
Inventors
- 👤 Daniel Howard Haywood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:58
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/22; A61M39/26
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) | 1911-04-07 | 1911-10-07 | 1912-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1915-04-07 | 1915-10-07 | 1916-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1919-04-07 | 1919-10-07 | 1920-04-07 | $7700.00 | Window Closed / Lapsed |