Patent US3028292A successfully refreshed from Google Patents.
US3028292A
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Method of manufacturing plastic rotor blades
Assignee: Parsons Corp
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Filing: 1957-05-27
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Granted: 1962-04-03
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Expires: 1977-05-27
Abstract
No abstract record available.
Inventors
- 👤 James A Hinds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:15
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/0025; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/30; B29C70/34; B29C70/345; B29C70/68; B29C70/74; B29C70/742; B29C70/86; B29D24/00; B29D24/002; B29D24/008; B29D99/0028; B64; B64C; B64C27/00; B64C27/32; B64C27/46; B64C27/473; B29L; B29L2031/00; B29L2031/30; B29L2031/3076; B29L2031/3085; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/1031
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A METHOD OF MANUFACTURING PLASTIC ROTOR BLADES OF THE TYPE HAVING A SPAR AND HAVING AFT THEREOF ONE OR MORE HOLLOW SPANWISE CELLS WHOSE WALLS ARE THINNER THAN THE SPAR, COMPRISING THE STEPS OF PR-MOLDING AND CURING
Claim 2
Independent Claim
37 words
A METHOD OF MANUFACTURING PLASTIC ROTOR BLADES OF THE TYPE HAVING A SPAR AND HAVING AFT THEREOF ONE OR MORE HOLLOW SPANWISE CELLS WHOSE WALLS ARE THINNER THAN THE SPAR, COMPRISING THE STEPS OF PR-MOLDING AND CURING
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-02 | 1965-10-02 | 1966-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-02 | 1969-10-02 | 1970-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-02 | 1973-10-02 | 1974-04-03 | $7700.00 | Window Closed / Lapsed |