Patent FR447299A successfully refreshed from Google Patents.
Patent US1817776A successfully refreshed from Google Patents.
US1817776A
Expired / Lapsed
US
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Coupling
Assignee: Individual
•
Filing: 1928-10-23
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Granted: 1931-08-04
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Expires: 1948-10-23
Abstract
No abstract record available.
Inventors
- 👤 Harry E Sipe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:28
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/02; F16L21/022; F16L17/00; F16L17/02; F16L17/04; F16L21/025; F16L37/00; F16L37/02; F16L37/04; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44641; Y10T24/44769; Y10T24/44906; Y10T24/44915
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) | 1934-08-03 | 1935-02-02 | 1935-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-08-03 | 1939-02-02 | 1939-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-08-03 | 1943-02-02 | 1943-08-04 | $7700.00 | Window Closed / Lapsed |