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US2982569A
Expired / Lapsed
US
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Concrete pipe joint
Assignee: Press-Seal Corp
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Filing: 1957-07-03
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Granted: 1961-05-02
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Expires: 1977-07-03
Abstract
No abstract record available.
Inventors
- 👤 Miller Marion Robert
- 👤 Raymond J Grundy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:52
CPC Classifications
F; F16; F16L; F16L25/00; F16L25/0027; F16L13/00; F16L13/10; F16L13/11; F16L13/113
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190612138A
Cited
US1985325A
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US2102072A
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US2032576A
Cited
US2223434A
Cited
US2401554A
Cited
US2501943A
Cited
US2815228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |