US2639599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closed system dry cleaning apparatus utilizing volatile solvent
Assignee: Individual
•
Filing: 1949-09-07
•
Granted: 1953-05-26
•
Expires: 1969-09-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Walker L Wellford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:32
CPC Classifications
D; D06; D06F; D06F43/00; D06F43/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US774025A
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US1615897A
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US1776190A
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US1843657A
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US2053103A
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US2140623A
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US1985376A
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US2198412A
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US2188353A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |