Patent US2355916A successfully refreshed from Google Patents.
Patent US3112183A successfully refreshed from Google Patents.
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
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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
2026-11-02 18:04
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.
References Cited (Backward Citations)
US1403352A
Cited
US928826A
Cited
US1706671A
Cited
US1792855A
Cited
US2007969A
Cited
US2355966A
Cited
US2779161A
Cited
US2901775A
Cited
US2774383A
Cited
US2773512A
Cited
US2898759A
Cited
US2972968A
Cited
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 |