US3112183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underground insulating conduit
Assignee: Concrete Thermal Casings Inc
•
Filing: 1960-01-07
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Granted: 1963-11-26
•
Expires: 1980-01-07
Abstract
No abstract record available.
Inventors
- 👤 David C Goff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:12
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/14; F16L59/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
THE METHOD OF INSULATING UNDERGROUND PIPE WHICH COMPRISES THE STEPS OF POSITIONING SAID PIPE IN A TRENCH IN THE EARTH IN SPACED RELATION FROM THE SIDES AND BOTTOM OF THE TRENCH, SURROUNDING SAID PIPE WITH A MIXTURE OF DRY GRANULAR INSULATING MATERIAL AND A WATER-FREE PARTICULATE HYDRATION SETTABLE CEMENTITIOUS BINDER, THEN ALLOWING SAID MIXTURE TO ABSORB MOISTURE FROM THE EARTH TO HYDRATE AT LEAST A PORTION OF THE SAID BINDER.
Claim 2
Independent Claim
70 words
THE METHOD OF INSULATING UNDERGROUND PIPE WHICH COMPRISES THE STEPS OF POSITIONING SAID PIPE IN A TRENCH IN THE EARTH IN SPACED RELATION FROM THE SIDES AND BOTTOM OF THE TRENCH, SURROUNDING SAID PIPE WITH A MIXTURE OF DRY GRANULAR INSULATING MATERIAL AND A WATER-FREE PARTICULATE HYDRATION SETTABLE CEMENTITIOUS BINDER, THEN ALLOWING SAID MIXTURE TO ABSORB MOISTURE FROM THE EARTH TO HYDRATE AT LEAST A PORTION OF THE SAID BINDER.
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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) | 1966-11-25 | 1967-05-27 | 1967-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-25 | 1971-05-27 | 1971-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-25 | 1975-05-27 | 1975-11-26 | $7700.00 | Window Closed / Lapsed |