Patent US2932855A successfully refreshed from Google Patents.
US2932855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming film or sheeting
Assignee: Eastman Kodak Co
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Filing: 1956-09-11
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Granted: 1960-04-19
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Expires: 1976-09-11
Abstract
No abstract record available.
Inventors
- 👤 Lawrence C Bartlett
- 👤 Harry J Krall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:27
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/74; B; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/16; B29C48/18; B29C48/21; B29C48/25; B29C48/30; B29C48/305; B29C48/307; B29C48/88; B29C48/911; B29C48/9135; B29C48/914
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
211 words
THE METHOD OF CASTING A COMPOSITE FILM ONTO THE SURFACE OF A CONTINUOUSLY MOVING SUPPORT COMPRISING THE STEPS OF CONTINUOUSLY EXTRUDING A STREAM OF A SOLUTION OF A COLLOIDAL MATERIAL FROM A STATIONARY HOPPER ONTO SAID MOVING SUPPORT SPACED TRANSVERSELY FROM SAID HOPPER BY A DISTANCE SUCH THAT A LAYER OF DOPE ISSUING FROM SAID HOPPER FORMS A SELF-SUSTAINING AND UNSUPPORTED RIBBON BRIDGING THE DISTANCE BETWEEN THE HOPPER AND SAID MOVING SUPPORT, SAID COLLOIDAL SOLUTION HAVING A VISCOSITY HIGH ENOUGH TO POSSES A FILM STRENGTH SUFFICIENT TO FORM A CONTINUOUS UNSUPPORTED RIBBON OF SOLUTION IN BRIDGING RELATION BETWEEN THE HOPPER AND SAID SUPPORT, FORMING A BEAD OF COATING SOLUTION AGAINST ONE SURFACE OF SAID UNSUPPORTED RIBBON OF COLLOIDAL SOLUTION IN SPACED RELATION WITH SAID SUPPORT ACROSS AN IN CONTACT WITH WHICH BEAD SAID RIBBON OF COLLOIDAL SOLUTION MOVES IN PASSING TO SAID SUPPORT, SAID COATING SOLUTION HAVING A VISCOSITY SUFFICIENTLY LOW TO PERMIT SAID RIBBON TO PICK UP A LAYER THEREOF ON ITS SURFACE BY A BEAD ACTION AS IT MOVES THEREACROSS, AND CONTINUOUSLY FEEDING A QUANTITY OF SAID COATING SOLUTION TO SAID BEAD COMMENSURATE WITH THE RATE AT WHICH IT IS TAKEN FROM SAID BEAD ON THE SURFACE OF SAID RIBBON TO SUBSTANTIALLY MAINTAIN SAID BEAD OF A GIVEN SIZE.
Claim 2
Independent Claim
211 words
THE METHOD OF CASTING A COMPOSITE FILM ONTO THE SURFACE OF A CONTINUOUSLY MOVING SUPPORT COMPRISING THE STEPS OF CONTINUOUSLY EXTRUDING A STREAM OF A SOLUTION OF A COLLOIDAL MATERIAL FROM A STATIONARY HOPPER ONTO SAID MOVING SUPPORT SPACED TRANSVERSELY FROM SAID HOPPER BY A DISTANCE SUCH THAT A LAYER OF DOPE ISSUING FROM SAID HOPPER FORMS A SELF-SUSTAINING AND UNSUPPORTED RIBBON BRIDGING THE DISTANCE BETWEEN THE HOPPER AND SAID MOVING SUPPORT, SAID COLLOIDAL SOLUTION HAVING A VISCOSITY HIGH ENOUGH TO POSSES A FILM STRENGTH SUFFICIENT TO FORM A CONTINUOUS UNSUPPORTED RIBBON OF SOLUTION IN BRIDGING RELATION BETWEEN THE HOPPER AND SAID SUPPORT, FORMING A BEAD OF COATING SOLUTION AGAINST ONE SURFACE OF SAID UNSUPPORTED RIBBON OF COLLOIDAL SOLUTION IN SPACED RELATION WITH SAID SUPPORT ACROSS AN IN CONTACT WITH WHICH BEAD SAID RIBBON OF COLLOIDAL SOLUTION MOVES IN PASSING TO SAID SUPPORT, SAID COATING SOLUTION HAVING A VISCOSITY SUFFICIENTLY LOW TO PERMIT SAID RIBBON TO PICK UP A LAYER THEREOF ON ITS SURFACE BY A BEAD ACTION AS IT MOVES THEREACROSS, AND CONTINUOUSLY FEEDING A QUANTITY OF SAID COATING SOLUTION TO SAID BEAD COMMENSURATE WITH THE RATE AT WHICH IT IS TAKEN FROM SAID BEAD ON THE SURFACE OF SAID RIBBON TO SUBSTANTIALLY MAINTAIN SAID BEAD OF A GIVEN SIZE.
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) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |