US3142234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manhole shield
Assignee: Individual
•
Filing: 1959-12-21
•
Granted: 1964-07-28
•
Expires: 1979-12-21
Abstract
No abstract record available.
Inventors
- 👤 Fred V Maloon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:44
CPC Classifications
E; E03; E03F; E03F5/00; E03F5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A SHIELD FOR USE ON A HORIZONTALLY DISPOSED, CENTRALLY OPEN MANHOLE FRAME THAT DEFINES THE OUTLINE OF A MANHOLE COMPRISING: AN OPEN ENDED VERTICALLY DISPOSED RIGID TUBE HAVING AN UPPER PORTION AND A LOWER PORTION AND A HORIZONTALLY DISPOSED FLANGE RIGID WITH SAID TUBE SURFACE OF SUCH FRAME FOR SUPPORTING SAID UPPER PORTION DIRECTLY ON SAID FRAME COAXIAL WITH THE LATTER AND PROJECTING UPWARDLY THEREON AND FOR SUPPORTING SAID LOWER PORTION WITHIN SUCH FRAME, AN AIR INFLATABLE TUBE BELOW SAID FLANGE AND AROUND SAID LOWER PORTION EXPANSIBLE UPON INFLATION WITH AIR FROM A COLLAPSED POSITION OUT OF SEALING ENGAGEMENT WITH SAID FRAME WHEN SAID FLANGE IS ON AND IN ENGAGEMENT WITH THE LATTER WHEREBY SAID RIGID TUBE MAY BE REMOVED FROM SAID FRAME WITHOUT INJURY TO
Claim 2
Dependent Claim
126 words
A SHIELD FOR USE ON A HORIZONTALLY DISPOSED, CENTRALLY OPEN MANHOLE FRAME THAT DEFINES THE OUTLINE OF A MANHOLE COMPRISING: AN OPEN ENDED VERTICALLY DISPOSED RIGID TUBE HAVING AN UPPER PORTION AND A LOWER PORTION AND A HORIZONTALLY DISPOSED FLANGE RIGID WITH SAID TUBE SURFACE OF SUCH FRAME FOR SUPPORTING SAID UPPER PORTION DIRECTLY ON SAID FRAME COAXIAL WITH THE LATTER AND PROJECTING UPWARDLY THEREON AND FOR SUPPORTING SAID LOWER PORTION WITHIN SUCH FRAME, AN AIR INFLATABLE TUBE BELOW SAID FLANGE AND AROUND SAID LOWER PORTION EXPANSIBLE UPON INFLATION WITH AIR FROM A COLLAPSED POSITION OUT OF SEALING ENGAGEMENT WITH SAID FRAME WHEN SAID FLANGE IS ON AND IN ENGAGEMENT WITH THE LATTER WHEREBY SAID RIGID TUBE MAY BE REMOVED FROM SAID FRAME WITHOUT INJURY TO
References Cited (Backward Citations)
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Cited
US1957162A
Cited
US2281633A
Cited
GB547072A
Cited
US2559564A
Cited
US2757225A
Cited
US3007600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |