Patent US3128680A successfully refreshed from Google Patents.
US3128680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming cigarette filter
Assignee: Philip Morris USA Inc
•
Filing: 1960-03-15
•
Granted: 1964-04-14
•
Expires: 1980-03-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward M Schaaf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:07
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/02; A24D3/0204; A24D3/0212; A24D3/0225
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
THE METHOD OF FORMING A ROD LIKE FILTER COMPRISING, FORMING A FIRST STRIP OF FIBROUS SHEET MATERIAL EMBODYING SOLID PARTICLES OF SMOKE FILTERING MATERIAL EXPOSED AT THE SURFACE OF THE SHEET, BRINGING THE SAID FIRST STRIP INTO SUPERPOSED PLIED RELATION WITH A SECOND STRIP OF FIBROUS ABSORBENT MATERIAL BUT STRONGER IN CHARACTER AND ADAPTED TO SERVE AS A CARRIER FOR THE FIRST STRIP, SIMULTANEOUSLY EMBOSSING THE TWO STRIPS IN THEIR PLIED RELATION TO PRODUCE INTERDIGITATED SURFACE AREAS OF THE TWO STRIPS, COMPRESSING THE PLIED AND EMBOSSED STRIPS LATERALLY INTO A CYLINDRICAL ROD, AND APPLYING AN ENCLOSING COVERING SHEET THERETO.
Claim 2
Independent Claim
99 words
THE METHOD OF FORMING A ROD LIKE FILTER COMPRISING, FORMING A FIRST STRIP OF FIBROUS SHEET MATERIAL EMBODYING SOLID PARTICLES OF SMOKE FILTERING MATERIAL EXPOSED AT THE SURFACE OF THE SHEET, BRINGING THE SAID FIRST STRIP INTO SUPERPOSED PLIED RELATION WITH A SECOND STRIP OF FIBROUS ABSORBENT MATERIAL BUT STRONGER IN CHARACTER AND ADAPTED TO SERVE AS A CARRIER FOR THE FIRST STRIP, SIMULTANEOUSLY EMBOSSING THE TWO STRIPS IN THEIR PLIED RELATION TO PRODUCE INTERDIGITATED SURFACE AREAS OF THE TWO STRIPS, COMPRESSING THE PLIED AND EMBOSSED STRIPS LATERALLY INTO A CYLINDRICAL ROD, AND APPLYING AN ENCLOSING COVERING SHEET THERETO.
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) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |