Patent US1985899A successfully refreshed from Google Patents.
US1985899A
Expired / Lapsed
US
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Pipe slip joint
Assignee: CALIFORNIA CORRUGATED CULVERT
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Filing: 1932-08-03
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Granted: 1935-01-01
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Expires: 1952-08-03
Abstract
No abstract record available.
Inventors
- 👤 John R Jahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:52
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/50; F16L37/52; Y; Y10; Y10S; Y10S285/00; Y10S285/918
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) | 1937-12-31 | 1938-07-02 | 1939-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-12-31 | 1942-07-02 | 1943-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-12-31 | 1946-07-02 | 1947-01-01 | $7700.00 | Window Closed / Lapsed |