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Patent US1881272A successfully refreshed from Google Patents.
US1881272A
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Bleeder valve
Assignee: Brassert & Co
•
Filing: 1929-05-13
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Granted: 1932-10-04
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Expires: 1949-05-13
Abstract
No abstract record available.
Inventors
- 👤 Grilli John Phillip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:00
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/002; C21B7/005; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4358; Y10T137/6416; Y10T137/6525; Y10T137/7722; Y10T137/7781; Y10T137/7782; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7921; Y10T137/794; Y10T137/8049
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) | 1935-10-04 | 1936-04-04 | 1936-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-10-04 | 1940-04-04 | 1940-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-10-04 | 1944-04-04 | 1944-10-04 | $7700.00 | Window Closed / Lapsed |