US2938532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum breaker
Assignee: Speakman Co
•
Filing: 1956-04-16
•
Granted: 1960-05-31
•
Expires: 1976-04-16
Abstract
No abstract record available.
Inventors
- 👤 Fraser James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:17
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/02; E03C1/10; E03C1/102; E03C1/104; E03C1/108; Y; Y10; Y10T; Y10T137/00; Y10T137/3149; Y10T137/3185; Y10T137/3294; Y10T137/3331
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2270737A
Cited
US2347988A
Cited
US2629393A
Cited
US2663309A
Cited
US2746477A
Cited
US2707481A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |