US3544404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making polypropylene bags
Assignee: Burlington Industries Inc
•
Filing: 1968-01-05
•
Granted: 1970-12-01
•
Expires: 1988-01-05
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Johnson
- 👤 Jack Leach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:27
CPC Classifications
D; D03; D03D; D03D3/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1054
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2619089A
Cited
US2798523A
Cited
US3033257A
Cited
US3155121A
Cited
US3439865A
Cited
US3360015A
Cited
US3360014A
Cited
US3445055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |