US2654671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper product and process for its preparation
Assignee: Hercules Powder Co
•
Filing: 1948-07-17
•
Granted: 1953-10-06
•
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 16:28
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
Cited
FR849126A
Cited
US2325302A
Cited
US2315675A
Cited
US2338602A
Cited
US2375245A
Cited
US2402020A
Cited
US2354574A
Cited
US2449951A
Cited
US2448542A
Cited
US2491472A
Cited
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 |