Patent US3047930A successfully refreshed from Google Patents.
US3047930A
Expired / Lapsed
US
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Means and method for providing access to pipe couplings in concrete slabs
Assignee: Individual
•
Filing: 1961-06-09
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Granted: 1962-08-07
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Expires: 1981-06-09
Abstract
No abstract record available.
Inventors
- 👤 Robert C Doyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:21
CPC Classifications
F; F16; F16L; F16L5/00; F16L5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2212974A
Cited
US2270286A
Cited
US2659124A
Cited
US2916909A
Cited
US2914832A
Cited
US2870515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-06 | 1966-02-05 | 1966-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-06 | 1970-02-05 | 1970-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-06 | 1974-02-05 | 1974-08-07 | $7700.00 | Window Closed / Lapsed |