Patent US2773601A successfully refreshed from Google Patents.
US2773601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for constructing water filters and product thereof
Assignee: R T COLLIER Corp
•
Filing: 1953-09-21
•
Granted: 1956-12-11
•
Expires: 1973-09-21
Abstract
No abstract record available.
Inventors
- 👤 Philip B Keller
- 👤 Walter M Kofford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:10
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/28; C02F1/283; B; B01; B01J; B01J20/00; B01J20/02; B01J20/20; B01J20/28; B01J20/28014; B01J20/28026; B01J20/2803; B01J20/28052; C02F1/001; C02F1/003; C02F2307/00; C02F2307/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A METHOD FOR PRODUCING FILTERS INCLUDING: PLACING UPON A SUPPORT WITHIN A CONFINING CASING A SUPPORT LAYER OF LOOSE GRANULAR MATERIAL COMMINGLED WITH UNSET BINDER SUBSTANCE; DEPOSITING UPON THE SUPPORT LAYER A BED OF LOOSE FILTER MATERIAL; PLACING UPON THE TOP OF SAID BED A SECOND LAYER OF LOOSE GRANULAR MATERIAL COMMINGLED WITH UNSET BINDER SUBSTANCE; AND TREATING THE RESULTANT ASSEMBLY IN SAID CASING TO HARDEN SAID BINDER SUBSTANCE IN THE TWO LAYERS IN SITU ON SAID SUPPORT AND WITHIN SAID CASING.
Claim 2
Independent Claim
82 words
A METHOD FOR PRODUCING FILTERS INCLUDING: PLACING UPON A SUPPORT WITHIN A CONFINING CASING A SUPPORT LAYER OF LOOSE GRANULAR MATERIAL COMMINGLED WITH UNSET BINDER SUBSTANCE; DEPOSITING UPON THE SUPPORT LAYER A BED OF LOOSE FILTER MATERIAL; PLACING UPON THE TOP OF SAID BED A SECOND LAYER OF LOOSE GRANULAR MATERIAL COMMINGLED WITH UNSET BINDER SUBSTANCE; AND TREATING THE RESULTANT ASSEMBLY IN SAID CASING TO HARDEN SAID BINDER SUBSTANCE IN THE TWO LAYERS IN SITU ON SAID SUPPORT AND WITHIN SAID CASING.
References Cited (Backward Citations)
US9760A
Cited
US133953A
Cited
US335581A
Cited
US433710A
Cited
US494837A
Cited
US1620815A
Cited
US1914829A
Cited
US2103572A
Cited
US2297248A
Cited
US2436077A
Cited
US2664278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |