US3326100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manhole extension
Assignee: Individual
•
Filing: 1965-05-14
•
Granted: 1967-06-20
•
Expires: 1985-05-14
Abstract
No abstract record available.
Inventors
- 👤 Edwin H White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:59
CPC Classifications
E; E02; E02D; E02D29/00; E02D29/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A MANHOLE HOUSING EXTENSION COMPRISING A RING MEMBER HAVING A LOWER PORTION ADAPTED TO SEAT WITHIN A MANHOLE HOUSING, AN UPPER PORTION OF GREATER DIAMETER THAN THE LOWER PORTION, AND FORMING WITH THE LOWER PORTION A SEAT ADAPTED TO RECEIVE A MANHOLE COVER, AN OUTWARDLY DIRECTED FLANGE SURROUNDING THE RING MEMBER AT JUNCTION BETWEEN THE LOWER AND UPPER PORTIONS AND FORMING A SEAT MEMBER, A RESILIENT HOLD DOWN MEMBER HAVING AN INNER REINFORCING RING SEATED UPON SAID SEAT MEMBER, SAID HOLD DOWN MEMBER HAVING A PORTION EXTENDING OUTWARDLY FROM SAID REINFORCING RING AND PROVIDED WITH APERTURES TO RECEIVE A BONDING MATERIAL FOR ANCHORING THE RING MEMBER TO PAVEMENT.
Claim 2
Dependent Claim
108 words
A MANHOLE HOUSING EXTENSION COMPRISING A RING MEMBER HAVING A LOWER PORTION ADAPTED TO SEAT WITHIN A MANHOLE HOUSING, AN UPPER PORTION OF GREATER DIAMETER THAN THE LOWER PORTION, AND FORMING WITH THE LOWER PORTION A SEAT ADAPTED TO RECEIVE A MANHOLE COVER, AN OUTWARDLY DIRECTED FLANGE SURROUNDING THE RING MEMBER AT JUNCTION BETWEEN THE LOWER AND UPPER PORTIONS AND FORMING A SEAT MEMBER, A RESILIENT HOLD DOWN MEMBER HAVING AN INNER REINFORCING RING SEATED UPON SAID SEAT MEMBER, SAID HOLD DOWN MEMBER HAVING A PORTION EXTENDING OUTWARDLY FROM SAID REINFORCING RING AND PROVIDED WITH APERTURES TO RECEIVE A BONDING MATERIAL FOR ANCHORING THE RING MEMBER TO PAVEMENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |