US2970979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl chloride compositions having improved impact strength
Assignee: Shell USA Inc
•
Filing: 1958-03-24
•
Granted: 1961-02-07
•
Expires: 1978-03-24
Abstract
No abstract record available.
Inventors
- 👤 Adrianus J W Meder
- 👤 Nellius G Kramer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:59
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L9/00; C08L9/02; C08L9/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2511113A
Cited
US2624683A
Cited
GB698385A
Cited
US2660194A
Cited
US2791600A
Cited
US2753322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |