Patent US2515968A successfully refreshed from Google Patents.
Patent US1814677A successfully refreshed from Google Patents.
US1814677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stopper for pipe lines
Assignee: Individual
•
Filing: 1930-05-03
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Granted: 1931-07-14
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Expires: 1950-05-03
Abstract
No abstract record available.
Inventors
- 👤 Fennema Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:36
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/10
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) | 1934-07-13 | 1935-01-12 | 1935-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-07-13 | 1939-01-12 | 1939-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-07-13 | 1943-01-12 | 1943-07-14 | $7700.00 | Window Closed / Lapsed |