US2707984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of insulating underground pipe
Assignee: Zonolite Co
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Filing: 1952-06-26
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Granted: 1955-05-10
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Expires: 1972-06-26
Abstract
No abstract record available.
Inventors
- 👤 David C Goff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:54
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/14; F16L59/15
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
55 words
THE METHOD OF INSULATING AN UNDERGROUND PIPE WHICH COMPRISES WRAPPING A LAYER OF GLASS WOOL ABOUT THE PERIPHERY OF SAID PIPE, SUPPORTING SAID PIPE ALONG SPACED SUPPORT BLOCKS OF A HEAT INSULTING MONOLITHIC CONCRETE MATERIAL, PASSING A HEATED FLUID THROUGH SAID PIPE AND POURING AN AQUEOUS COMPOSITION OF INSULATING CONCRETE ABOUT SAID FLUID HEATED PIPE.
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) | 1958-05-09 | 1958-11-08 | 1959-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-09 | 1962-11-08 | 1963-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-09 | 1966-11-08 | 1967-05-10 | $7700.00 | Window Closed / Lapsed |