US2453662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condenser
Assignee: Graham Manufacturing Co Inc
•
Filing: 1944-03-02
•
Granted: 1948-11-09
•
Expires: 1964-03-02
Abstract
No abstract record available.
Inventors
- 👤 Harold M Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:12
CPC Classifications
F; F28; F28B; F28B1/00; F28B1/02; Y; Y10; Y10S; Y10S165/00; Y10S165/184; Y10S165/192
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US865875A
Cited
US1764782A
Cited
GB273262A
Cited
US1780476A
Cited
US1796708A
Cited
US1855231A
Cited
US1935864A
Cited
US2168902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-09 | 1952-05-10 | 1952-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-09 | 1956-05-10 | 1956-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-09 | 1960-05-10 | 1960-11-09 | $7700.00 | Window Closed / Lapsed |