US2805972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe lines and sheathing material therefor
Assignee: KANSAS CITY TESTING LAB
•
Filing: 1950-07-17
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Granted: 1957-09-10
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Expires: 1970-07-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Walter M Cross
- 👤 Cross Forbes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:43
CPC Classifications
F; F16; F16L; F16L58/00; F16L58/02; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24744
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PIPE LINE LAID IN CONTACT WITH THE SOIL AND COMPRISING METAL PIPE, A SHEET OF CORRUGATED PAPER SURROUNDING SAID PIPE, A SHEET OF FLAT PAPER ON THE OUTER SURFACE OF SAID SHEET OF CORRUGATED PAPER AND SURROUNDING IT, AND A LAYER OF TARRY MATERIAL BETWEEN SAID PIPE AND SAID SHEET OF CORRUGATED PAPER SUBSTANTIALLY COMPLETELY COVERING THE INNER SURFACE OF THE LAYER, SAID TARRY MATERIAL BEING NORMALLY SOLID AND MELTING TO A PLASTIC STATE WHEN HEATED.
Claim 2
Dependent Claim
77 words
A PIPE LINE LAID IN CONTACT WITH THE SOIL AND COMPRISING METAL PIPE, A SHEET OF CORRUGATED PAPER SURROUNDING SAID PIPE, A SHEET OF FLAT PAPER ON THE OUTER SURFACE OF SAID SHEET OF CORRUGATED PAPER AND SURROUNDING IT, AND A LAYER OF TARRY MATERIAL BETWEEN SAID PIPE AND SAID SHEET OF CORRUGATED PAPER SUBSTANTIALLY COMPLETELY COVERING THE INNER SURFACE OF THE LAYER, SAID TARRY MATERIAL BEING NORMALLY SOLID AND MELTING TO A PLASTIC STATE WHEN HEATED.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |