US2923224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air distributor
Assignee: THERMOTANK Inc
•
Filing: 1956-11-20
•
Granted: 1960-02-02
•
Expires: 1976-11-20
Abstract
No abstract record available.
Inventors
- 👤 Stewart Lain Maxwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:07
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1517434A
Cited
GB477512A
Cited
DE741505C
Cited
US2398938A
Cited
US2470488A
Cited
GB647816A
Cited
GB686005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |