US2752950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Connection means for heating and ventilating ducts
Assignee: Individual
•
Filing: 1953-05-12
•
Granted: 1956-07-03
•
Expires: 1973-05-12
Abstract
No abstract record available.
Inventors
- 👤 Coulters Thomas Carey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:04
CPC Classifications
F; F16; F16L; F16L9/00; F16L9/003; F24; F24F; F24F13/00; F24F13/02; F24F13/0209
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1356022A
Cited
US1934330A
Cited
US726004A
Cited
US760216A
Cited
US1935690A
Cited
US2498753A
Cited
US2627430A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-03 | 1960-01-02 | 1960-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-03 | 1964-01-02 | 1964-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-03 | 1968-01-02 | 1968-07-03 | $7700.00 | Window Closed / Lapsed |