Patent US3537485A successfully refreshed from Google Patents.
US3537485A
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US
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Duct modules for climate control system
Assignee: PRES GLAS Corp A CORP OF MI
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Filing: 1967-09-12
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Granted: 1970-11-03
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Expires: 1987-09-12
Abstract
No abstract record available.
Inventors
- 👤 John J March
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:28
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/02; F28F1/04; F28F1/045; F16; F16L; F16L9/00; F16L9/18; F24; F24F; F24F13/00; F24F13/02; F24F13/0272
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |