US3019850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prefabricated insulated duct and sound trap
Assignee: Individual
•
Filing: 1958-04-08
•
Granted: 1962-02-06
•
Expires: 1978-04-08
Abstract
No abstract record available.
Inventors
- 👤 John J March
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:02
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/8209; F; F16; F16L; F16L55/00; F16L55/02; F16L55/027; F16L55/02754; F16L9/00; F16L9/003; F16L9/21; F24; F24F; F24F13/00; F24F13/24; E04B1/84; E04B2001/8423; E04B2001/8433; E04B2001/8457; E04B2001/8476; E04B2001/848
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PREFABRICATED DUCT SECTION HAVING SUBSTANTIALLY RECTANGULAR SHAPE COMPRISING A PLURALITY OF EQUALLY DIMENSIONED GLASS FIBER SECTIONS HAVING AN OUTER COATING OF ALUMINUM FOIL AFFIXED THERETO AND AN INNER COATING OF PERFORATED METAL AFFIXED THERETO, PLURAL ANGULARLY FORMED HINGED PORTIONS PROVIDED IN THE PERFORATED METAL AND THE GLASS FIBER MAT, ADHESIVE MEANS DISPOSED ON SAID HINGED PORTIONS TO EFFECTIVELY SEAL SAID HINGED PORTIONS AS A UNITARY JOINT UPON THE ANGULAR ASSEMBLY OF THE DUCT INTO SUBSTANTIALLY RECTANGULAR SHAPE, SOUND ATTENUATION MEANS DISPOSED
Claim 2
Dependent Claim
82 words
A PREFABRICATED DUCT SECTION HAVING SUBSTANTIALLY RECTANGULAR SHAPE COMPRISING A PLURALITY OF EQUALLY DIMENSIONED GLASS FIBER SECTIONS HAVING AN OUTER COATING OF ALUMINUM FOIL AFFIXED THERETO AND AN INNER COATING OF PERFORATED METAL AFFIXED THERETO, PLURAL ANGULARLY FORMED HINGED PORTIONS PROVIDED IN THE PERFORATED METAL AND THE GLASS FIBER MAT, ADHESIVE MEANS DISPOSED ON SAID HINGED PORTIONS TO EFFECTIVELY SEAL SAID HINGED PORTIONS AS A UNITARY JOINT UPON THE ANGULAR ASSEMBLY OF THE DUCT INTO SUBSTANTIALLY RECTANGULAR SHAPE, SOUND ATTENUATION MEANS DISPOSED
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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) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |