US2861598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible duct construction
Assignee: Individual
•
Filing: 1955-09-29
•
Granted: 1958-11-25
•
Expires: 1975-09-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Stephen D Carder
- 👤 Richard D Savacool
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:56
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/005; F16L59/00; F16L59/14; F16L59/153; F24; F24F; F24F13/00; F24F13/02; F24F13/0218; Y; Y10; Y10S; Y10S138/00; Y10S138/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US294780A
Cited
US376401A
Cited
US752700A
Cited
US992516A
Cited
US1052861A
Cited
US1942468A
Cited
US2321064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |