Patent US3715305A successfully refreshed from Google Patents.
US3715305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for increasing sedimentation rate of heterogeneous colloidal suspension systems
Assignee: New England Institute Inc
•
Filing: 1971-01-22
•
Granted: 1973-02-06
•
Expires: 1991-01-22
Abstract
Abstract A process for increasing the sedimentation rate of heterogeneous colloidal suspension systems comprises the step of subjecting the system to an electromagnetic field in the radio frequency range.
Inventors
- 👤 J Heller
- 👤 J Carnes
- 👤 J Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:21
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/48; C02F1/46; C02F1/461; C02F1/463; C02F2201/00; C02F2201/46; C02F2201/461; C02F2201/46105; C02F2201/4616; C02F2201/46175
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
56 words
A process for increasing the sedimentation rate of suspensoids in a heterogeneous colloidal suspension to cause an agglomeration of said suspensoids comprising the step of subjecting said colloidal suspension to electromagnetic radiation from a radio frequency source, the temperature of said colloidal suspension remaining substantially constant while said colloidal suspension is subjected to said electromagnetic radiation.
Claim 2
Dependent Claim
56 words
A process for increasing the sedimentation rate of suspensoids in a heterogeneous colloidal suspension to cause an agglomeration of said suspensoids comprising the step of subjecting said colloidal suspension to electromagnetic radiation from a radio frequency source, the temperature of said colloidal suspension remaining substantially constant while said colloidal suspension is subjected to said electromagnetic radiation.
Claim 3
Dependent Claim
31 words
A process for increasing the sedimentation rate of suspensoids in a heterogeneous colloidal suspension as set forth in claim 1, wherein said radio frequency source produces a pulsed radio frequency signal.
Claim 4
Dependent Claim
33 words
A process for increasing the sedimentation rate of suspensoids in a heterogeneous colloidal suspension as set forth in claim 1, wherein said heterogeneous colloidal suspension comprises at least two differently colloidally suspended materials.
Claim 5
Dependent Claim
34 words
A process for increasing the sedimentation rate of suspensoids in a heterogeneous colloidal suspension as set forth in claim 1, wherein said heterogeneous colloidal suspension comprises a single colloidally suspended material of non-uniform size.
Claim 6
Dependent Claim
32 words
A process for increasing the sedimentation rate of suspensoids in a heterogeneous colloidal suspension as set forth in claim 1, wherein said heterogeneous colloidal suspension is protohemin suspended in water and pyridine.
Claim 7
Dependent Claim
35 words
A process for increasing the sedimentation rate of suspensoids in a heterogeneous colloidal suspension as set forth in claim 1, wherein said heterogeneous colloidal suspension is calcium sulfate, ferric hydroxide and ferrous hydroxide in water.
Claim 8
Dependent Claim
30 words
A process for increasing the sedimeNtation rate of suspensoids in a heterogeneous colloidal suspension as set forth in claim 1, wherein said radio frequency field is approximately at 19 megahertz.
Claim 9
Dependent Claim
27 words
A process for increasing the sedimentation rate of suspensoids in a heterogeneous colloidal suspension as set forth in claim 1, wherein said heterogeneous colloidal suspension is organic.
References Cited (Backward Citations)
GB356783A
Cited
GB500271A
Cited
US2896922A
Cited
GB805547A
Cited
US3206397A
Cited
US3264213A
Cited
US3594314A
Cited
US3660234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |