US2721574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-saving device
Assignee: Individual
•
Filing: 1951-07-21
•
Granted: 1955-10-25
•
Expires: 1971-07-21
Abstract
No abstract record available.
Inventors
- 👤 Elmer J Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:36
CPC Classifications
A; A47; A47L; A47L15/00; A47L15/42; D; D06; D06F; D06F39/00; D06F39/08; Y; Y10; Y10S; Y10S68/00; Y10S68/902; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/265; Y10T137/2668; Y10T137/2673; Y10T137/2675; Y10T137/7287; Y10T137/7358; Y10T137/7381; Y10T137/7394
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-24 | 1959-04-25 | 1959-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-24 | 1963-04-25 | 1963-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-24 | 1967-04-25 | 1967-10-25 | $7700.00 | Window Closed / Lapsed |