US2718461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of leaching and felting glass fiber
Assignee: BP Chemicals Hitco Inc
•
Filing: 1954-08-02
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Granted: 1955-09-20
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Expires: 1974-08-02
Abstract
No abstract record available.
Inventors
- 👤 Parker Leon
- 👤 Robert C Nordberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:45
CPC Classifications
C; C03; C03C; C03C13/00; C03C13/005; C03C25/00; C03C25/66; C03C25/68; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS FOR LEACHING SILICEOUS GLASS FIBER TO FORM SILICA FIBERS WHICH COMPRISES ESTABLISHING A BED OF GLASS FIBERS, FLOWING AN AQUEOUS ACID SOLUTION THROUGH SAID BED, WITHDRAWING ACID FROM SAID BED, MAINTAININIG THE TEMPERATURE OF THE ACID ENTERING SAID BED AT A LOWER TEMPERATURE THAN THE TEMPERATURE OF THE ACID EXISTING FROM THE BED, AND MAINTAINING THE TEMPERATURE OF THE ACID EXITING FROM THE BED BELOW THE BOILING POINT OF THE AQUEOUS SOLUTION OF THE ACID.
Claim 2
Dependent Claim
77 words
A PROCESS FOR LEACHING SILICEOUS GLASS FIBER TO FORM SILICA FIBERS WHICH COMPRISES ESTABLISHING A BED OF GLASS FIBERS, FLOWING AN AQUEOUS ACID SOLUTION THROUGH SAID BED, WITHDRAWING ACID FROM SAID BED, MAINTAININIG THE TEMPERATURE OF THE ACID ENTERING SAID BED AT A LOWER TEMPERATURE THAN THE TEMPERATURE OF THE ACID EXISTING FROM THE BED, AND MAINTAINING THE TEMPERATURE OF THE ACID EXITING FROM THE BED BELOW THE BOILING POINT OF THE AQUEOUS SOLUTION OF THE ACID.
References Cited (Backward Citations)
US2491761A
Cited
US2686954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-19 | 1959-03-21 | 1959-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-19 | 1963-03-21 | 1963-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-19 | 1967-03-21 | 1967-09-20 | $7700.00 | Window Closed / Lapsed |