Patent US2654671A successfully refreshed from Google Patents.
US2654671A
Expired / Lapsed
US
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Paper product and process for its preparation
Assignee: Hercules Powder Co
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Filing: 1948-07-17
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Granted: 1953-10-06
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Expires: 1968-07-17
Abstract
No abstract record available.
Inventors
- 👤 Julian L Azorlosa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:11
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/44; D21H17/45; D21H17/455
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A HIGH DRY-STRENGTH AND HIGH WET-STRENGTH PAPER COMPRISING CELLULOSIC PAPER FIBERS AND UP TO ABOUT 15% BASED ON THE WEIGHT OF PULP OF A POLYMERIC MATERIAL WHOSE MAJOR MONOMER CONSTITUENT IS A VINYL-SUBSTITUTED PYRIDINE COMPOUND.
Claim 2
Dependent Claim
35 words
A HIGH DRY-STRENGTH AND HIGH WET-STRENGTH PAPER COMPRISING CELLULOSIC PAPER FIBERS AND UP TO ABOUT 15% BASED ON THE WEIGHT OF PULP OF A POLYMERIC MATERIAL WHOSE MAJOR MONOMER CONSTITUENT IS A VINYL-SUBSTITUTED PYRIDINE COMPOUND.
References Cited (Backward Citations)
US1716654A
Cited
GB439024A
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FR849126A
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US2325302A
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US2315675A
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US2338602A
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US2375245A
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US2402020A
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US2354574A
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US2449951A
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US2448542A
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US2491472A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-05 | 1957-04-06 | 1957-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-05 | 1961-04-06 | 1961-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-05 | 1965-04-06 | 1965-10-06 | $7700.00 | Window Closed / Lapsed |