Patent US2693415A successfully refreshed from Google Patents.
US2693415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of adding extra filler to the edges of paper
Assignee: Ecusta Paper Corp
•
Filing: 1951-04-10
•
Granted: 1954-11-02
•
Expires: 1971-04-10
Abstract
No abstract record available.
Inventors
- 👤 Milton O Schur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:12
CPC Classifications
A; A24; A24D; A24D1/00; A24D1/02; D; D21; D21H; D21H17/00; D21H17/63; D21H17/67; D21H17/675
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
116 words
A METHOD OF AVOIDING THE USUAL DEFICIENTY OF FILLER CONTENT AT THE EDGES OF A FILLED PAPER SHEET PRODUCED ON THE FORMING WIRE OF A PAPER MACHINE, COMPRISING ADDING CONTROLLED AMOUNTS OF FILLER SLURRY TO THE PULP AND FILLER FURNISH IN THE PAPER MACHINE HEAD BOX AT LOCATIONS ADJACENT TO THE EDGES OF THE HEAD BOX IN LINE WITH THE EDGES OF THE PAPER SHEET PRODUCED ON THE FORMING WIRE, THE ADDED AMOUNTS OF FILLER BLENDING WITH THE POOL OF FURNISH IN THE HEAD BOX AND ALTHOUGH LEAVING THE PREDOMINANT AMOUNT OF THE ADDED FILLER WITHIN THE RELATIVELY NARROW AREAS WHERE IT IS INTRODUCED, NEVERTHELESS CAUSING NO STREAKS IN THE PAPER SHEET FORMED FROM SAID FURNISH.
References Cited (Backward Citations)
US254929A
Cited
US328300A
Cited
US1790822A
Cited
US1039413A
Cited
US1811613A
Cited
US1803642A
Cited
US2033481A
Cited
US2189832A
Cited
US2265455A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-01 | 1958-05-03 | 1958-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-01 | 1962-05-03 | 1962-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-01 | 1966-05-03 | 1966-11-02 | $7700.00 | Window Closed / Lapsed |