Patent US691975A successfully refreshed from Google Patents.
US691975A
Expired / Lapsed
US
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Paper-pulp-discharge valve.
Assignee: Individual
•
Filing: 1900-03-15
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Granted: 1902-01-28
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Expires: 1920-03-15
Abstract
No abstract record available.
Inventors
- 👤 Heinrich Schaaf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:26
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/22; F16K5/222; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4259; Y10T137/4358; Y10T137/4379; Y10T137/8593; Y10T137/87153; Y10T137/87161
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) | 1905-01-27 | 1905-07-29 | 1906-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1909-01-27 | 1909-07-29 | 1910-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1913-01-27 | 1913-07-29 | 1914-01-28 | $7700.00 | Window Closed / Lapsed |