Patent US2957764A successfully refreshed from Google Patents.
Patent US3449227A successfully refreshed from Google Patents.
US3449227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of asbestos
Assignee: Turner Brothers Asbestos Co Ltd
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Filing: 1966-11-08
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Granted: 1969-06-10
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Expires: 1986-11-08
Abstract
No abstract record available.
Inventors
- 👤 Gordon F Heron
- 👤 John O Halstead
- 👤 Robert B Gettins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:45
CPC Classifications
C; C25; C25D; C25D1/00; C25D1/12; C25D1/14; C25B; C25B7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A PROCESS FOR THE PRODUCTION OF AN ASBESTOS PRODUCT COMPRISING THE STEPS OF DRAWING FROM A RESERVOIR AN ANIONIC AQUEOUS DISPERSION OF ASBESTOS FIBRES THAT IS RESPONSIVE TO ELECTROPHORESIS, PASSING THE WITHDRAWN DISPERSION BETWEEN A CATHODE AND AN ANODE, APPLYING AN ELECTRIC POTENTIAL DIFFERENCE ACROSS SAID CATHODE AND ANODE, WHEREBY SOLID CONSTITUENTS ARE CAUSED TO MIGRATE TOWARDS THE ANODE, COLLECTING THE MIGRATING CONSTITUENTS AS A DEPOSIT, REMOVING THE DEPOSIT FROM THE REMAINDER OF THE DISPERSION, RETURNING THE REMAINDER OF THE DISPERSION TO THE RESERVOIR, AND REPLENISHING THE DISPERSION.
Claim 2
Dependent Claim
88 words
A PROCESS FOR THE PRODUCTION OF AN ASBESTOS PRODUCT COMPRISING THE STEPS OF DRAWING FROM A RESERVOIR AN ANIONIC AQUEOUS DISPERSION OF ASBESTOS FIBRES THAT IS RESPONSIVE TO ELECTROPHORESIS, PASSING THE WITHDRAWN DISPERSION BETWEEN A CATHODE AND AN ANODE, APPLYING AN ELECTRIC POTENTIAL DIFFERENCE ACROSS SAID CATHODE AND ANODE, WHEREBY SOLID CONSTITUENTS ARE CAUSED TO MIGRATE TOWARDS THE ANODE, COLLECTING THE MIGRATING CONSTITUENTS AS A DEPOSIT, REMOVING THE DEPOSIT FROM THE REMAINDER OF THE DISPERSION, RETURNING THE REMAINDER OF THE DISPERSION TO THE RESERVOIR, AND REPLENISHING THE DISPERSION.
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) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |