Patent US2651829A successfully refreshed from Google Patents.
US2651829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface active media
Assignee: GEA Group AG
•
Filing: 1950-07-25
•
Granted: 1953-09-15
•
Expires: 1970-07-25
Abstract
No abstract record available.
Inventors
- 👤 Nusslein Joseph
- 👤 Main
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:17
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/52; D06M13/522
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
IN THE PROCESSING OF WOOL THE STEP OF FULLING THE WOOL WITH A SURFACE ACTIVE PHOSPHORIC ACID ESTER IN AN AQUEOUS MEDIUM, SAID PHOSPHORIC ACID ESTER BEING SELECTED FROM THE GROUP CONSISTING OF AN ORTHO-PHOSPHORIC ACID MONOESTER, AN ORTHO-PHOSPHORIC ACID DI-ESTER AND A MIXTURE OF THE SAID ESTERS.
Claim 2
Dependent Claim
48 words
IN THE PROCESSING OF WOOL THE STEP OF FULLING THE WOOL WITH A SURFACE ACTIVE PHOSPHORIC ACID ESTER IN AN AQUEOUS MEDIUM, SAID PHOSPHORIC ACID ESTER BEING SELECTED FROM THE GROUP CONSISTING OF AN ORTHO-PHOSPHORIC ACID MONOESTER, AN ORTHO-PHOSPHORIC ACID DI-ESTER AND A MIXTURE OF THE SAID ESTERS.
References Cited (Backward Citations)
DE575660C
Cited
GB354851A
Cited
GB354300A
Cited
GB417654A
Cited
US2026785A
Cited
US2005619A
Cited
DE648558C
Cited
US2130570A
Cited
US2165857A
Cited
US2407279A
Cited
US2485341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |