Patent US3524390A successfully refreshed from Google Patents.
US3524390A
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US
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Sealed joint intersection
Assignee: ROBERT F DILL
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Filing: 1968-05-24
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Granted: 1970-08-18
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Expires: 1988-05-24
Abstract
No abstract record available.
Inventors
- 👤 Robert F Dill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:12
CPC Classifications
E; E02; E02B; E02B3/00; E02B3/16; E01; E01C; E01C23/00; E01C23/06; E01C23/09; E01C23/0966; E01C23/0973; E04; E04B; E04B1/00; E04B1/62; E04B1/66; E04B1/68
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) | 1973-08-17 | 1974-02-16 | 1974-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-17 | 1978-02-16 | 1978-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-17 | 1982-02-16 | 1982-08-18 | $7700.00 | Window Closed / Lapsed |