Patent US3956927A successfully refreshed from Google Patents.
US774730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for excluding drafts from open doorways.
Assignee: Individual
•
Filing: 1903-02-28
•
Granted: 1904-11-08
•
Expires: 1923-02-28
Abstract
No abstract record available.
Inventors
- 👤 Theophilus Van Kannel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:59
CPC Classifications
F; F24; F24F; F24F9/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1907-11-08 | 1908-05-09 | 1908-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1911-11-08 | 1912-05-09 | 1912-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1915-11-08 | 1916-05-09 | 1916-11-08 | $7700.00 | Window Closed / Lapsed |