Patent US3266524A successfully refreshed from Google Patents.
US3266524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duct structure
Assignee: Individual
•
Filing: 1963-05-20
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Granted: 1966-08-16
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Expires: 1983-05-20
Abstract
No abstract record available.
Inventors
- 👤 William H Goettl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:17
CPC Classifications
F; F16; F16L; F16L9/00; F16L9/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
168 words
IN A DUAL PASSAGE DUCT STRUCTURE THE COMBINATION OF: A RECTANGULAR IN CROSS SECTION HOLLOW DUCT STRUCTURE HAVING FOUR SIDES AND HAVING TWO PASSAGES THEREIN, A BAFFLE SEPARATING SAID PASSAGES; FIRST, SECOND AND THIRD TRIANGULAR PORTIONS OF SAID BAFFLE ALL ANGULARLY DISPOSED RELATIVE TO EACH OTHER; SAID FIRST TRIANGULAR PORTION HAVING A BASE SIDE ABRIDGING AND EXTENDING ACROSS THE INTERIOR OF SAID DUCT SECTION FROM ONE OF SAID SIDES TO AN OPPOSITE SIDE THEREOF, SAID SECOND AND THIRD TRIANGULAR PORTIONS ALIGNED WITH EACH OTHER IN A SUBSTANTIALLY COMMON LINE EXTENDING DIAGONALLY FROM THE INTERIOR OF ONE CORNER OF SAID DUCT STRUCTURE TO THE INTERIOR OF AN OPPOSITE CORNER OF SAID RECTANGULAR IN CROSS SECTION DUCT STRUCTURE; A SECOND RECTANGULAR IN CROSS SECTION DUCT STRUCTURE SIMILAR TO SAID FIRST MENTIONED DUCT STRUCTURE AND HAVING OPPOSITE OPEN ENDS; ONE OF SAID OPEN ENDS COUPLED TO A SIMILAR OPEN END OF SAID FIRST DUCT STRUCTURE; A SECOND BAFFLE IN SAID SECOND DUCT STRUCTURE, SAID SECOND BAFFLE SIMILAR TO SAID FIRST MENTIONED
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) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |