US3175586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conduit and method of manufacture
Assignee: Individual
•
Filing: 1963-04-08
•
Granted: 1965-03-30
•
Expires: 1983-04-08
Abstract
No abstract record available.
Inventors
- 👤 Tatsch Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:21
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/02; F16L59/029; F16L9/00; F16L9/003; F16L9/14; F16L9/147; F16L9/16; F16L9/21; F24; F24F; F24F13/00; F24F13/02; F24F13/0263
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
AN IMPROVED GAS CONDUIT HAVING A RIGID, FIRE RESISTING STRUCTURE OF DESIRABLE ACOUSTICAL PROPERTIES COMPRISING: AN INNER WALL FORMED OF A MAT OF RANDOMLY DISTRIBUTED GLASS FIBERS; AND AN OUT WALL MADE OF A RIGID, FRACTURABLE, NON-FLEXIBLE AND NON-ELASTIC PLASTIC FOAM MATERIAL PLACED ABOUT SAID INNER GLASS FIBER WALL AND SERVING AS A RIGID BACKING THEREOF.
Claim 2
Dependent Claim
56 words
AN IMPROVED GAS CONDUIT HAVING A RIGID, FIRE RESISTING STRUCTURE OF DESIRABLE ACOUSTICAL PROPERTIES COMPRISING: AN INNER WALL FORMED OF A MAT OF RANDOMLY DISTRIBUTED GLASS FIBERS; AND AN OUT WALL MADE OF A RIGID, FRACTURABLE, NON-FLEXIBLE AND NON-ELASTIC PLASTIC FOAM MATERIAL PLACED ABOUT SAID INNER GLASS FIBER WALL AND SERVING AS A RIGID BACKING THEREOF.
References Cited (Backward Citations)
US1416334A
Cited
US1916908A
Cited
US1860533A
Cited
US2047778A
Cited
US2333026A
Cited
US2489048A
Cited
US2873226A
Cited
US2798510A
Cited
US2936792A
Cited
US2906317A
Cited
US2879803A
Cited
GB866949A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |