US2743900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide valve
Assignee: Parker Appliance Co
•
Filing: 1952-11-28
•
Granted: 1956-05-01
•
Expires: 1972-11-28
Abstract
No abstract record available.
Inventors
- 👤 Theodore H Holzer
- 👤 Donald C Asbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:54
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/06; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86622; Y10T137/8663; Y10T137/86879
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US566501A
Cited
US1942232A
Cited
US2394487A
Cited
US2664267A
Cited
US2669417A
Cited
US2601990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |