US3069391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyhydroxymethylene polymers
Assignee: EIDP Inc
•
Filing: 1960-02-05
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Granted: 1962-12-18
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Expires: 1980-02-05
Abstract
No abstract record available.
Inventors
- 👤 Schaefgen John Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:02
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/14; Y; Y10; Y10S; Y10S8/00; Y10S8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A METHOD FOR MAKING FILAMENTS COMPRISING EXTRUDING POLYVINYLENE CARBONATE THROUGH AN ORIFICE TO OBTAIN A FILAMENT, AND IMMERSING SAID FILAMENT IN A HYDROLYZING AGENT UNTIL THERE RESULTS A POLYMER WHOSE STRUCTURAL FORMULA CONTAINS AT LEAST ABOUT 75% OF THE REPEATING UNIT
Claim 2
Independent Claim
41 words
A METHOD FOR MAKING FILAMENTS COMPRISING EXTRUDING POLYVINYLENE CARBONATE THROUGH AN ORIFICE TO OBTAIN A FILAMENT, AND IMMERSING SAID FILAMENT IN A HYDROLYZING AGENT UNTIL THERE RESULTS A POLYMER WHOSE STRUCTURAL FORMULA CONTAINS AT LEAST ABOUT 75% OF THE REPEATING UNIT
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) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |