US2549177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sized paper, composition therefor, and method of making same
Assignee: Strathmore Paper Co
•
Filing: 1949-03-21
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Granted: 1951-04-17
•
Expires: 1969-03-21
Abstract
No abstract record available.
Inventors
- 👤 Paul B Davidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:43
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/24; D21H17/28; G; G03; G03C; G03C1/00; G03C1/64; G03C1/76; G03C1/775; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31975
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A PAPER HAVING A WET TENSILE STRENGTH IN EXCESS OF 900 GRAMS AND A WET RUB VALUE ABOVE 5, AND CHARACTERIZED IN HAVING A STRING PREDOMINANTLY CONSISTING OF REACTION PRODUCT OF GLYOXAL AND PAPER-MAKER''S MODIFIED STARCH, SAID GLYOXAL BEING PRESENT AS ONE-FIFTIETH TO ONE-TWENTIETH BY WEIGHT OF THE DRY WEIGHT OF STARCH.
Claim 2
Dependent Claim
52 words
A PAPER HAVING A WET TENSILE STRENGTH IN EXCESS OF 900 GRAMS AND A WET RUB VALUE ABOVE 5, AND CHARACTERIZED IN HAVING A STRING PREDOMINANTLY CONSISTING OF REACTION PRODUCT OF GLYOXAL AND PAPER-MAKER''S MODIFIED STARCH, SAID GLYOXAL BEING PRESENT AS ONE-FIFTIETH TO ONE-TWENTIETH BY WEIGHT OF THE DRY WEIGHT OF STARCH.
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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) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |