Patent US2981978A successfully refreshed from Google Patents.
US2981978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of shrinking solid polymethylene terephthalate with halogenated methanes
Assignee: EIDP Inc
•
Filing: 1955-08-30
•
Granted: 1961-05-02
•
Expires: 1975-08-30
Abstract
No abstract record available.
Inventors
- 👤 John M Griffing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:15
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/08; D04; D04H; D04H1/00; D04H1/04; D04H1/06; Y; Y10; Y10S; Y10S8/00; Y10S8/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
THE METHOD OF SHRINKING A SOLID CRYSTALLINE ORIENTED HIGH POLYMERIC POLYMETHYLENE TEREPHTHALATE STRUCTURE COMPRISING CONTACTING IT WITH A NORMALLY LIQUID PARTIALLY HALOGENATED METHANE OF THE FORMULA
Claim 2
Independent Claim
26 words
THE METHOD OF SHRINKING A SOLID CRYSTALLINE ORIENTED HIGH POLYMERIC POLYMETHYLENE TEREPHTHALATE STRUCTURE COMPRISING CONTACTING IT WITH A NORMALLY LIQUID PARTIALLY HALOGENATED METHANE OF THE FORMULA
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) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |