US1439904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple-lock pump
Assignee: Individual
•
Filing: 1918-06-03
•
Granted: 1922-12-26
•
Expires: 1938-06-03
Abstract
No abstract record available.
Inventors
- 👤 William H Lockwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:19
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/08; B67D7/10; B67D7/103
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) | 1925-12-25 | 1926-06-26 | 1926-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-12-25 | 1930-06-26 | 1930-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-12-25 | 1934-06-26 | 1934-12-26 | $7700.00 | Window Closed / Lapsed |