Patent US3764541A successfully refreshed from Google Patents.
US3764541A
Expired / Lapsed
US
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Detergent intermediate and process therefor
Assignee: BASF Corp
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Filing: 1971-12-23
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Granted: 1973-10-09
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Expires: 1991-12-23
Abstract
Abstract A detergent intermediate for use in phosphate-free detergent formulations is provided by absorbing a liquid surfactant onto a coarse light soda ash utilizing a pan pelletizer to effectuate absorption.
Inventors
- 👤 T Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:30
CPC Classifications
C; C11; C11D; C11D11/00; C11D1/00; C11D1/66; C11D1/72; C11D3/00; C11D3/02; C11D3/04; C11D3/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
20 words
The process of claim 1 wherein the soda ash has a mesh size of -20 +100 U.S. Standard Sieve number.
Claim 2
Dependent Claim
20 words
The process of claim 2 wherein the soda ash has a U.S. Standard Sieve number mesh size of -10 +80.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein the surfactant is sprayed onto the soda ash.
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |