US1351906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve for deep wells
Assignee: Individual
•
Filing: 1916-09-29
•
Granted: 1920-09-07
•
Expires: 1936-09-29
Abstract
No abstract record available.
Inventors
- 👤 Charles M Heeter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:29
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/12; F04B53/125; F04B53/129; F04B53/1037; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/7914
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) | 1923-09-07 | 1924-03-08 | 1924-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-09-07 | 1928-03-08 | 1928-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-09-07 | 1932-03-08 | 1932-09-07 | $7700.00 | Window Closed / Lapsed |