US2932683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fittings for floor duct systems
Assignee: Walker Brothers Co
•
Filing: 1956-09-06
•
Granted: 1960-04-12
•
Expires: 1976-09-06
Abstract
No abstract record available.
Inventors
- 👤 Charles T Flachbarth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:45
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/02; H02G3/08; H02G3/18; H02G3/185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US466416A
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US646283A
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US1106103A
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US1058068A
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US2014444A
Cited
US2201507A
Cited
US2548706A
Cited
GB717629A
Cited
US2738892A
Cited
US2779496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-12 | 1963-10-12 | 1964-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-12 | 1967-10-12 | 1968-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-12 | 1971-10-12 | 1972-04-12 | $7700.00 | Window Closed / Lapsed |