US1397739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fresh-air valve for buildings
Assignee: Individual
•
Filing: 1920-06-14
•
Granted: 1921-11-22
•
Expires: 1940-06-14
Abstract
No abstract record available.
Inventors
- 👤 Malcolm B Moyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:46
CPC Classifications
A; A01; A01K; A01K1/00; A01K1/0047; A01K1/0064; Y; Y10; Y10T; Y10T137/00; Y10T137/794; Y10T137/8122
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) | 1924-11-21 | 1925-05-23 | 1925-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-11-21 | 1929-05-23 | 1929-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-11-21 | 1933-05-23 | 1933-11-22 | $7700.00 | Window Closed / Lapsed |