US3465529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double-ended socket coupling for stoneware pipes
Assignee: Individual
•
Filing: 1967-05-31
•
Granted: 1969-09-09
•
Expires: 1987-05-31
Abstract
No abstract record available.
Inventors
- 👤 Bernd-Heinz Helle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:04
CPC Classifications
E; E02; E02B; E02B11/00; E02B11/005; B; B60; B60R; B60R1/00; B60R1/02; B60R1/06; F; F16; F16L; F16L21/00; F16L21/002; F16L21/005; F16L49/00; F16L49/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US417127A
Cited
US1077132A
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US1538669A
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US1801758A
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US2052020A
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US2116165A
Cited
US2893212A
Cited
US3081599A
Cited
US3103789A
Cited
US3246920A
Cited
US3360283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-08 | 1973-03-10 | 1973-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-08 | 1977-03-10 | 1977-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-08 | 1981-03-10 | 1981-09-09 | $7700.00 | Window Closed / Lapsed |