US2852813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for handling and processing tubular film
Assignee: Dow Chemical Co
•
Filing: 1956-03-16
•
Granted: 1958-09-23
•
Expires: 1976-03-16
Abstract
No abstract record available.
Inventors
- 👤 Murrey O Longstreth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:24
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/02; B29C55/04; B26; B26D; B26D3/00; B26D3/001; B29C48/00; B29C48/001; B29C48/0022; B29C2793/00; B29C2793/0063; B29C48/0018; B29C48/0019; B29C48/03; B29C48/09; B29C48/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
METHOD FOR HANDLING A PROCESSING TUBULAR FILM INTO FLAT FILM SHEETS AND THE LIKE WHICH COMPRISES EXTRUDING A FILM-FORMING MATERIAL INTO A TUBULARLY FORMED FILM, OMNIRADIALLY FLARING THE TUBULARLY FORMED FILM OUTWARDLY FROM A CENTER THROUGH A RING-LIKE FLARING MEANS AS A UNITARY THIN SHEET BEING CONDUCTED IN A DISCOID FORM SLITTING THE MOVING DISCOFORM FLARED SHEET RADIALLY
Claim 2
Dependent Claim
58 words
METHOD FOR HANDLING A PROCESSING TUBULAR FILM INTO FLAT FILM SHEETS AND THE LIKE WHICH COMPRISES EXTRUDING A FILM-FORMING MATERIAL INTO A TUBULARLY FORMED FILM, OMNIRADIALLY FLARING THE TUBULARLY FORMED FILM OUTWARDLY FROM A CENTER THROUGH A RING-LIKE FLARING MEANS AS A UNITARY THIN SHEET BEING CONDUCTED IN A DISCOID FORM SLITTING THE MOVING DISCOFORM FLARED SHEET RADIALLY
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) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |