Patent US3141815A successfully refreshed from Google Patents.
US3141815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of improving inorganic filler retention in paper by addition of ethylene oxide homopolymer
Assignee: ChampionX LLC
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Filing: 1960-07-27
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Granted: 1964-07-21
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Expires: 1980-07-27
Abstract
No abstract record available.
Inventors
- 👤 John A Manley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:18
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/53
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A PROCESS FOR IMPROVING INORGANIC FILLER AND FIBER FINES RETENTION IN THE MANUFACTURE OF PAPER WHICH COMPRISES ADDING TO AN INORGANIC FILLED PAPER STOCK AT LEAST 0.04 POUND PER TON OF AIR DRIED FIBER OF A WATER SOLUBLE ETHYLENE OXIDE HOMOPOLYMER WHICH HAS AN AVERAGE MOLECULAR WEIGHT OF AT LEAST 50,000.
Claim 2
Dependent Claim
51 words
A PROCESS FOR IMPROVING INORGANIC FILLER AND FIBER FINES RETENTION IN THE MANUFACTURE OF PAPER WHICH COMPRISES ADDING TO AN INORGANIC FILLED PAPER STOCK AT LEAST 0.04 POUND PER TON OF AIR DRIED FIBER OF A WATER SOLUBLE ETHYLENE OXIDE HOMOPOLYMER WHICH HAS AN AVERAGE MOLECULAR WEIGHT OF AT LEAST 50,000.
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) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |