Patent US3537937A successfully refreshed from Google Patents.
US3537937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for filament winding planar structures
Assignee: Koppers Co Inc
•
Filing: 1966-12-15
•
Granted: 1970-11-03
•
Expires: 1986-12-15
Abstract
No abstract record available.
Inventors
- 👤 Jonas Medney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:36
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C69/00; B29C69/001; B29C69/002; B29C69/003; B29C70/28; B29C70/40; B29C70/50; D; D04; D04H; D04H3/00; D04H3/02; D04H3/04; B29C33/00; B29C33/56; B29C33/60; B29K; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/10; B29K2105/101; B29K2105/108; B29L; B29L2007/00; B29L2007/008
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |