US1702974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible valve and method of making same
Assignee: AG Spalding & Bros
•
Filing: 1928-05-12
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Granted: 1929-02-19
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Expires: 1948-05-12
Abstract
No abstract record available.
Inventors
- 👤 William W Macdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:18
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/20; F16K15/202; Y; Y10; Y10S; Y10S116/00; Y10S116/09; Y10T; Y10T137/00; Y10T137/3584; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/788; Y10T137/7882
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) | 1932-02-19 | 1932-08-20 | 1933-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-02-19 | 1936-08-20 | 1937-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-02-19 | 1940-08-20 | 1941-02-19 | $7700.00 | Window Closed / Lapsed |