Patent US3012971A successfully refreshed from Google Patents.
US3012971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Whitening composition for paper
Assignee: EIDP Inc
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Filing: 1959-04-07
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Granted: 1961-12-12
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Expires: 1979-04-07
Abstract
No abstract record available.
Inventors
- 👤 Gessner Joseph
- 👤 Sayler Ralph Crawford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:16
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/30; D06; D06L; D06L4/00; D06L4/60; D06L4/664
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A COMPOSITION OF MATTER FOR WHITENING PAPER, CONSISTING ESSENTIALLY OF A CONCENTRATED AQUEOUS SOLUTION OF A WHITENING AGENT AND AN ALKYLOLAMINE AND BEING ADAPTED TO BE DILUTED WITH WATER TO GIVE AN AQUEOUS TREATMENT BATH, SAID COMPOSITION BEING THE PRODUCT OF MIXING TOGETHER WATER, A WHITENING AGENT OF THE FORMULA
Claim 2
Dependent Claim
50 words
A COMPOSITION OF MATTER FOR WHITENING PAPER, CONSISTING ESSENTIALLY OF A CONCENTRATED AQUEOUS SOLUTION OF A WHITENING AGENT AND AN ALKYLOLAMINE AND BEING ADAPTED TO BE DILUTED WITH WATER TO GIVE AN AQUEOUS TREATMENT BATH, SAID COMPOSITION BEING THE PRODUCT OF MIXING TOGETHER WATER, A WHITENING AGENT OF THE FORMULA
References Cited (Backward Citations)
GB647718A
Cited
US2878248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |