Patent US2621657A successfully refreshed from Google Patents.
US2979754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic waste collection apparatus for textile frames
Assignee: Pneumafil Corp
•
Filing: 1953-12-09
•
Granted: 1961-04-18
•
Expires: 1973-12-09
Abstract
No abstract record available.
Inventors
- 👤 Charles R Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:19
CPC Classifications
D; D01; D01H; D01H11/00; D01H11/005
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US519026A
Cited
US645469A
Cited
US879663A
Cited
US1443286A
Cited
US1856685A
Cited
US2147190A
Cited
US2140420A
Cited
US2391135A
Cited
US2425577A
Cited
CH256989A
Cited
US2669744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |