US1422444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controller for automatic vacuum breakers
Assignee: Individual
•
Filing: 1921-04-14
•
Granted: 1922-07-11
•
Expires: 1941-04-14
Abstract
No abstract record available.
Inventors
- 👤 Waldo A Howland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:59
CPC Classifications
F; F01; F01B; F01B25/00; F01B2250/00; F01B2250/002; Y; Y10; Y10T; Y10T137/00; Y10T137/3149; Y10T137/3185; Y10T137/3294; Y10T137/7287; Y10T137/7358; Y10T137/7368; Y10T137/7371; Y10T137/7423; Y10T137/7426
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) | 1925-07-10 | 1926-01-09 | 1926-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-07-10 | 1930-01-09 | 1930-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-07-10 | 1934-01-09 | 1934-07-11 | $7700.00 | Window Closed / Lapsed |