Patent US3046853A successfully refreshed from Google Patents.
US3046853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manhole closure
Assignee: Individual
•
Filing: 1959-03-02
•
Granted: 1962-07-31
•
Expires: 1979-03-02
Abstract
No abstract record available.
Inventors
- 👤 Legendre Cyrille
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:00
CPC Classifications
E; E02; E02D; E02D29/00; E02D29/12; E02D29/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US559164A
Cited
US1447256A
Cited
GB199912A
Cited
US1710571A
Cited
US1673145A
Cited
GB263962A
Cited
US1746992A
Cited
GB444212A
Cited
GB492190A
Cited
GB535177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |