US3177280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of polyurethane coated balls
Assignee: Dunlop Rubber Co Ltd
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Filing: 1961-05-23
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Granted: 1965-04-06
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Expires: 1981-05-23
Abstract
No abstract record available.
Inventors
- 👤 Ford Peter
- 👤 Watson John William
- 👤 Ottewell Roger James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:37
CPC Classifications
C; C08; C08G; C08G18/00; B; B29; B29C; B29C33/00; B29C33/12; B29C45/00; B29C45/14; B29C45/14065; B29C45/14819; B29D; B29D99/00; B29D99/0042; B29C2045/14122; B29C2791/00; B29C2791/001; B29C35/00; B29C35/02; B29C35/0227; B29C43/00; B29C59/00; B29C59/02; B29K; B29K2075/00; B29K2105/00; B29K2105/06; B29K2105/20; B29L; B29L2031/00; B29L2031/54; B29L2031/545; B29L2031/546; Y; Y10; Y10S; Y10S273/00; Y10S273/08; Y10S425/00; Y10S425/812
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS FOR THE MANUFACTURE OF BALLS WHICH COMPRISES SUPPORTING A PREFORMED BALL CORE; FORMING AN INTEGRAL, UNPATTERNED SOLID COVER THEREON BY APPLYING TO SAID SUPPORTED CORE, A VISCOUS LIQUID CURABLE POLYURETHANE PRE-POLYMER AND PARTIALLY CURING SAID POLYURETHANE UNTIL THE COVER IS SOLID BUT STILL SUBSTANTIALLY THERMOPLASTIC; COOLING SAID COVER TO A TEMPERATURE AT WHICH FURTHER CURING OF THE POLYURETHANE IS INHIBITED; TRANSFERRING SAID PARTIALLY CURED COATED CORE TO A BALL MOULD PROVIDED WITH A PATTERNED MOULDING SURFACE AND MOULDING THE COATED CORE TO A PATTERNED BALL THEREIN WHILE SIMULTANEOUSLY FURTHER CURING THE POLYURETHANE TO A SUBSTANTIALLY NONTHERMOPLASTIC STATE.
Claim 2
Dependent Claim
99 words
A PROCESS FOR THE MANUFACTURE OF BALLS WHICH COMPRISES SUPPORTING A PREFORMED BALL CORE; FORMING AN INTEGRAL, UNPATTERNED SOLID COVER THEREON BY APPLYING TO SAID SUPPORTED CORE, A VISCOUS LIQUID CURABLE POLYURETHANE PRE-POLYMER AND PARTIALLY CURING SAID POLYURETHANE UNTIL THE COVER IS SOLID BUT STILL SUBSTANTIALLY THERMOPLASTIC; COOLING SAID COVER TO A TEMPERATURE AT WHICH FURTHER CURING OF THE POLYURETHANE IS INHIBITED; TRANSFERRING SAID PARTIALLY CURED COATED CORE TO A BALL MOULD PROVIDED WITH A PATTERNED MOULDING SURFACE AND MOULDING THE COATED CORE TO A PATTERNED BALL THEREIN WHILE SIMULTANEOUSLY FURTHER CURING THE POLYURETHANE TO A SUBSTANTIALLY NONTHERMOPLASTIC STATE.
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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) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |