US3540870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for drawing and coating quartz glass fibers
Assignee: United States Department of the Air Force
•
Filing: 1968-05-07
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Granted: 1970-11-17
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Expires: 1988-05-07
Abstract
No abstract record available.
Inventors
- 👤 Pei Ching Li
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:36
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/02; C03B37/025; C03B37/029; C03B37/027; C03C; C03C25/00; C03C25/10; C03C25/12; C03C25/22; C03C25/42; C03B2205/00; C03B2205/60; C03B2205/62; C03B2205/64; C03B2205/72; C03B2205/80; C03B2205/90; C03B2205/92; Y; Y10; Y10S; Y10S65/00; Y10S65/08
Claims Analysis
Total Claims: 0
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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) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |