US3460859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duct coupling frame and corner member
Assignee: Individual
•
Filing: 1967-03-23
•
Granted: 1969-08-12
•
Expires: 1987-03-23
Abstract
No abstract record available.
Inventors
- 👤 Henry M Keating
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:51
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/0209; F16; F16L; F16L23/00; F16L23/12; F16L23/14; Y; Y10; Y10T; Y10T403/00; Y10T403/57
Claims Analysis
Total Claims: 0
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US3199901A
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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) | 1972-08-11 | 1973-02-10 | 1973-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-11 | 1977-02-10 | 1977-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-11 | 1981-02-10 | 1981-08-12 | $7700.00 | Window Closed / Lapsed |