US2607322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansion engine
Assignee: Arthur D Little Inc
•
Filing: 1946-04-26
•
Granted: 1952-08-19
•
Expires: 1966-04-26
Abstract
No abstract record available.
Inventors
- 👤 Samuel C Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:39
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/06; F25B2400/00; F25B2400/14; F25B2400/141
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US670773A
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US761339A
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GB191107986A
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US1106930A
Cited
US1611159A
Cited
US1491797A
Cited
US1927617A
Cited
US2113149A
Cited
US2291243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-19 | 1956-02-18 | 1956-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-19 | 1960-02-18 | 1960-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-19 | 1964-02-18 | 1964-08-19 | $7700.00 | Window Closed / Lapsed |