US3293891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular double drum type counterflow washing machine for textiles, especially laundry
Assignee: Individual
•
Filing: 1964-04-30
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Granted: 1966-12-27
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Expires: 1984-04-30
Abstract
No abstract record available.
Inventors
- 👤 Sulzmann Erich Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:10
CPC Classifications
D; D06; D06F; D06F31/00; D06F31/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A TUBULAR DOUBLE DRUM TYPE COUNTERFLOW WASHING MACHINE FOR TEXTILES, ESPECIALLY LAUNDRY, COMPRISING A STATIONARY TUBULAR OUTER DRUM, AN INNER WASHING DRUM ROTATABLE IN SAID OUTER DRUM, A PLURALITY OF AXIALLY SPACED BEARING RAILS ARRANGED BETWEEN THE OUTER DRUM AND THE INNER WASHING DRUM AND DEFINING INDIVIDUAL LIQUOR COMPARTMENTS IN THE OUTER DRUM, ANNULAR PARTITION MEANS SUBDIVIDING THE INTERIOR OF THE INNER WASHING DRUM INTO AT LEAST ONE SOAKING OR PRE-WASHING COMPARTMENT AND A PLURALITY OF WASHING COMPARTMENTS, THE BEARING RAIL BE-
Claim 2
Dependent Claim
82 words
A TUBULAR DOUBLE DRUM TYPE COUNTERFLOW WASHING MACHINE FOR TEXTILES, ESPECIALLY LAUNDRY, COMPRISING A STATIONARY TUBULAR OUTER DRUM, AN INNER WASHING DRUM ROTATABLE IN SAID OUTER DRUM, A PLURALITY OF AXIALLY SPACED BEARING RAILS ARRANGED BETWEEN THE OUTER DRUM AND THE INNER WASHING DRUM AND DEFINING INDIVIDUAL LIQUOR COMPARTMENTS IN THE OUTER DRUM, ANNULAR PARTITION MEANS SUBDIVIDING THE INTERIOR OF THE INNER WASHING DRUM INTO AT LEAST ONE SOAKING OR PRE-WASHING COMPARTMENT AND A PLURALITY OF WASHING COMPARTMENTS, THE BEARING RAIL BE-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |