US2733090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coplen
Assignee: —
•
Filing: —
•
Granted: 1956-01-31
•
Expires: 1973-01-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:18
CPC Classifications
F; F25; F25D; F25D29/00; F25D29/006; Y; Y10; Y10S; Y10S292/00; Y10S292/65; Y10S292/71; Y10T; Y10T292/00; Y10T292/08; Y10T292/0908; Y10T292/091; Y10T292/1043; Y10T292/1051; Y10T292/1052; Y10T292/1055; Y10T292/175; Y10T292/19; Y10T292/68; Y10T292/696; Y10T292/702
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US247531A
Cited
US573489A
Cited
US779789A
Cited
US1204072A
Cited
US1244910A
Cited
US1234661A
Cited
US1534216A
Cited
US1847564A
Cited
US2272167A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-30 | 1959-08-01 | 1960-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-30 | 1963-08-01 | 1964-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-30 | 1967-08-01 | 1968-01-31 | $7700.00 | Window Closed / Lapsed |