US3256569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Web density control means for web forming apparatus
Assignee: Proctor and Schwartz Inc
•
Filing: 1963-09-24
•
Granted: 1966-06-21
•
Expires: 1983-09-24
Abstract
No abstract record available.
Inventors
- 👤 Robert C Draving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:54
CPC Classifications
D; D01; D01G; D01G15/00; D01G15/02; D01G15/12; D01G15/46; D01G15/465; D04; D04H; D04H1/00; D04H1/70; D04H1/72
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US974858A
Cited
US2152901A
Cited
US2648876A
Cited
US2703441A
Cited
US3010161A
Cited
US2952047A
Cited
GB880698A
Cited
US3037248A
Cited
US3108332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |