US2580030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure regulating apparatus
Assignee: Niles Bement Pond Co
•
Filing: 1945-03-24
•
Granted: 1951-12-25
•
Expires: 1965-03-24
Abstract
No abstract record available.
Inventors
- 👤 Lee Leighton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:06
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/24; F04C14/26; B; B64; B64D; B64D37/00; B64D37/02; B64D37/14; B64D37/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2170530A
Cited
US2189210A
Cited
US2263091A
Cited
US2268807A
Cited
US2299079A
Cited
US2368883A
Cited
US2375076A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |