Patent US2768994A successfully refreshed from Google Patents.
US2768994A
Expired / Lapsed
US
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Polyoxymethylenes
Assignee: EIDP Inc
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Filing: 1954-02-04
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Granted: 1956-10-30
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Expires: 1974-02-04
Abstract
No abstract record available.
Inventors
- 👤 Macdonald Robert Neal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:06
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; C08G2/08; D; D01; D01F; D01F6/00; D01F6/58; D01F6/66; Y; Y10; Y10S; Y10S74/00; Y10S74/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A NORMALLY SOLID, SYNTHETIC, HIGH MOLECULAR WEIGHT POLYOXYMETHYLENE SELECTED FROM THE GROUP CONSISTING OF (1) POLYOXYMETHYLENES HAVING A DEGREE OF TOUGHNESS OF AT LEAST 1, SAID DEGREE OF TOUGHNESS OF AT LEAST 1 BEING DETERMINED BY THE CONSECUTIVE STEPS OF COMPRESSION- MOLDING SAID POLYOXYMETHYLENE INTO FILM 3 TO 7 MILS IN THICKNESS, HEATING SAID FILM IN AIR AT 105* C. FOR 7 DAYS, COOLING SAID FILM TO ROOM TEMPERATURE, AND, WHILE MAINTAINING SAID FILM AT ROOM TEMPERATURE, MANUALLY FOLDING AND CREASING SAID FILM ALONG A LINE, AND MANUALLY FOLDING AND CREASING SAID FILM IN THE REVERSE DIRECTION ALONG THE SAME LINE WITHOUT A BREAK OCCURRING IN THE FILM ALONG SAID LINE, AND (2) POLYOXYMETHYLENES, FAILING TO EXHIBIT A DEGREE
Claim 2
Dependent Claim
119 words
A NORMALLY SOLID, SYNTHETIC, HIGH MOLECULAR WEIGHT POLYOXYMETHYLENE SELECTED FROM THE GROUP CONSISTING OF (1) POLYOXYMETHYLENES HAVING A DEGREE OF TOUGHNESS OF AT LEAST 1, SAID DEGREE OF TOUGHNESS OF AT LEAST 1 BEING DETERMINED BY THE CONSECUTIVE STEPS OF COMPRESSION- MOLDING SAID POLYOXYMETHYLENE INTO FILM 3 TO 7 MILS IN THICKNESS, HEATING SAID FILM IN AIR AT 105* C. FOR 7 DAYS, COOLING SAID FILM TO ROOM TEMPERATURE, AND, WHILE MAINTAINING SAID FILM AT ROOM TEMPERATURE, MANUALLY FOLDING AND CREASING SAID FILM ALONG A LINE, AND MANUALLY FOLDING AND CREASING SAID FILM IN THE REVERSE DIRECTION ALONG THE SAME LINE WITHOUT A BREAK OCCURRING IN THE FILM ALONG SAID LINE, AND (2) POLYOXYMETHYLENES, FAILING TO EXHIBIT A DEGREE
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) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |