Patent US4077472A successfully refreshed from Google Patents.
Patent US936440A successfully refreshed from Google Patents.
US936440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-air register.
Assignee: Individual
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Filing: 1907-11-29
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Granted: 1909-10-12
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Expires: 1927-11-29
Abstract
No abstract record available.
Inventors
- 👤 Ernest C Fox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:33
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F13/15; E; E06; E06B; E06B7/00; E06B7/02; E06B7/08; E06B7/084
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) | 1912-10-11 | 1913-04-12 | 1913-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-10-11 | 1917-04-12 | 1917-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-10-11 | 1921-04-12 | 1921-10-12 | $7700.00 | Window Closed / Lapsed |