Patent US2633430A successfully refreshed from Google Patents.
US2633430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making stretchable unified paper
Assignee: 3M Co
•
Filing: 1950-04-26
•
Granted: 1953-03-31
•
Expires: 1970-04-26
Abstract
No abstract record available.
Inventors
- 👤 Kellgren Waldo
- 👤 John W Marschall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:17
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/24; D21H25/00; D21H25/005; D21H27/00; D21H27/002; D21H27/004; D21H27/005; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24446; Y10T428/24455
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
THE METHOD OF MAKING A NEW AND USEFUL TYPE OF STRETCHABLE UNIFIED PAPER WHICH COMPRISES SEVERELY CALENDERING A FLAT, POROUS AND STRETCHABLE CREPED PAPER, IN THE ABSENCE OF FREE WATER, SO AS TO ROLL DOWN THE CREPING WRINKLES, DECREASE THE CALIPER THICKNESS BY AT LEAST ONE-FIFTH, AND SUBSTANTIALLY INCREASE THE DENSITY OF THE BODY STRUCTURE, THE CALENDERED PAPER BEING CAPABLE OF REVERSION; AND THEREAFTER, WITHOUT ALLOWING REVERSION TO THE PRE-CALENDERED CREPED STATE, UNIFYING THE PAPER BY APPLICATION OF A FLEXIBLE AND STRETCHABLE FIBER-BONDING COMPOSITION WHICH PREVENTS REVERSION, THE UNIFIED PAPER HAVING A STRETCH VALUE OF AT LEAST 10%.
Claim 2
Independent Claim
98 words
THE METHOD OF MAKING A NEW AND USEFUL TYPE OF STRETCHABLE UNIFIED PAPER WHICH COMPRISES SEVERELY CALENDERING A FLAT, POROUS AND STRETCHABLE CREPED PAPER, IN THE ABSENCE OF FREE WATER, SO AS TO ROLL DOWN THE CREPING WRINKLES, DECREASE THE CALIPER THICKNESS BY AT LEAST ONE-FIFTH, AND SUBSTANTIALLY INCREASE THE DENSITY OF THE BODY STRUCTURE, THE CALENDERED PAPER BEING CAPABLE OF REVERSION; AND THEREAFTER, WITHOUT ALLOWING REVERSION TO THE PRE-CALENDERED CREPED STATE, UNIFYING THE PAPER BY APPLICATION OF A FLEXIBLE AND STRETCHABLE FIBER-BONDING COMPOSITION WHICH PREVENTS REVERSION, THE UNIFIED PAPER HAVING A STRETCH VALUE OF AT LEAST 10%.
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) | 1956-03-30 | 1956-09-29 | 1957-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-30 | 1960-09-29 | 1961-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-30 | 1964-09-29 | 1965-03-31 | $7700.00 | Window Closed / Lapsed |