Patent US3260370A successfully refreshed from Google Patents.
US3260370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drycleaning filter element
Assignee: Motors Liquidation Co
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Filing: 1963-09-05
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Granted: 1966-07-12
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Expires: 1983-09-05
Abstract
No abstract record available.
Inventors
- 👤 Schwartzwalder Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:20
CPC Classifications
B; B01; B01D; B01D39/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
67 words
A COMPOSITE FLUID TREATING ELEMENT COMPRISING MEANS FORMING FIRST AND SECOND LAYERS FOR FILTERING FLUID, MEANS INTERPOSED BETWEEN SAID FIRST AND SECOND LAYERS AND PERMANENTLY SANDWICHED THEREWITH FOR SPACING SAID LAYERS AND INCLUDING MEANS FORMING VOIDS, AND GRANULAR MEANS IN LOOSE GRANULAR FORM IN SAID VOIDS RETAINED BY SAID LAST NAMED MEANS FOR CONDITIONING FLUID, SAID VOIDS BEING OF A SIZE RELATIVELY LARGER THAN SAID GRANULAR MEANS.
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) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |