Patent US1256703A successfully refreshed from Google Patents.
US3541802A
Expired / Lapsed
US
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Recovery of condensable products from gaseous mixtures
Assignee: Individual
•
Filing: 1968-06-25
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Granted: 1970-11-24
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Expires: 1988-06-25
Abstract
No abstract record available.
Inventors
- 👤 Judson S Swearingen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:00
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/06; F25J2210/00; F25J2210/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2685180A
Cited
US3205669A
Cited
US3218816A
Cited
US3274787A
Cited
US3212277A
Cited
US3292381A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-23 | 1974-05-25 | 1974-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-23 | 1978-05-25 | 1978-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-23 | 1982-05-25 | 1982-11-24 | $7700.00 | Window Closed / Lapsed |