US3333694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of resetting filter beds
Assignee: Individual
•
Filing: 1965-04-02
•
Granted: 1967-08-01
•
Expires: 1985-04-02
Abstract
No abstract record available.
Inventors
- 👤 Dell R Range
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:59
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/02; B01D24/20; B01D24/205; B01D24/46; B01D24/4668; B01D24/4678; B01D24/4689
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A METHOD OF RESETTING A PLURALITY OF FILTER BEDS COMPRISING A FIRST FILTER BED AND A SECOND FILTER BED COMPRISING, PROVIDING SAID FIRST FILTER BED HAVING A FIRST FILTER MATERIAL AND A SECOND FILTER MATERIAL THEREIN, PROVIDING SAID SECOND FILTER BED HAVING A THIRD FILTER MATERIAL AND A FOURTH FILTER MATERIAL THEREIN, REMOVING SAID FIRST FILTER MATERIAL AND SAID SECOND FILTER MATERIAL FROM SAID FIRST FILTER BED, SEPARATING SAID FIRST FILTER MATERIAL FROM SAID SECOND FILTER MATERIAL, PLACING SAID FIRST FILTER MATERIAL IN A REMOTE RESPOSITORY, RETURNING SAID SECOND FILTER MATERIAL TO SAID FIRST FILTER BED, REMOVING SAID THIRD FILTER MATERIAL AND SAID FOURTH FILTER MATERIAL FROM SAID SECOND FILTER BED, SEPARATING SAID THIRD FILTER MATERIAL FROM SAID FOURTH FILTER MATERIAL, PLACING SAID THIRD FILTER MATERIAL IN SAID FIRST FILTER BED, REPLACING SAID FOURTH FILTER MATERIAL IN SAID SECOND FILTER BED, AND REPLACING FILTER MATERIAL LIKE SAID FIRST FILTER MATERIAL IN SAID SECOND FILTER BED.
Claim 2
Independent Claim
155 words
A METHOD OF RESETTING A PLURALITY OF FILTER BEDS COMPRISING A FIRST FILTER BED AND A SECOND FILTER BED COMPRISING, PROVIDING SAID FIRST FILTER BED HAVING A FIRST FILTER MATERIAL AND A SECOND FILTER MATERIAL THEREIN, PROVIDING SAID SECOND FILTER BED HAVING A THIRD FILTER MATERIAL AND A FOURTH FILTER MATERIAL THEREIN, REMOVING SAID FIRST FILTER MATERIAL AND SAID SECOND FILTER MATERIAL FROM SAID FIRST FILTER BED, SEPARATING SAID FIRST FILTER MATERIAL FROM SAID SECOND FILTER MATERIAL, PLACING SAID FIRST FILTER MATERIAL IN A REMOTE RESPOSITORY, RETURNING SAID SECOND FILTER MATERIAL TO SAID FIRST FILTER BED, REMOVING SAID THIRD FILTER MATERIAL AND SAID FOURTH FILTER MATERIAL FROM SAID SECOND FILTER BED, SEPARATING SAID THIRD FILTER MATERIAL FROM SAID FOURTH FILTER MATERIAL, PLACING SAID THIRD FILTER MATERIAL IN SAID FIRST FILTER BED, REPLACING SAID FOURTH FILTER MATERIAL IN SAID SECOND FILTER BED, AND REPLACING FILTER MATERIAL LIKE SAID FIRST FILTER MATERIAL IN SAID SECOND FILTER BED.
References Cited (Backward Citations)
US2744840A
Cited
US3072567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |